The gripping true story of the only women to fly in combat in World War II—from Elizabeth Wein, award-winning author of Code Name VerityIn the early years of World War II, Josef Stalin issued an order that made the Soviet Union the first country in the world to allow female pilots to fly in combat. Led by Marina Raskova, these three regiments, including the 588th Night Bomber Regiment—nicknamed the “night witches”—faced intense pressure and obstacles both in the sky and on the ground. Some of these young women perished in flames. Many of them were in their teens when they went to war.This is the story of Raskova’s three regiments, women who enlisted and were deployed on the front lines of battle as navigators, pilots, and mechanics. It is the story of a thousand young women who wanted to take flight to defend their country, and the woman who brought them together in the sky.Packed with black-and-white photographs, fascinating sidebars, and thoroughly researched details, A Thousand Sisters is the inspiring true story of a group of women who set out to change the world, and the sisterhood they formed even amid the destruction of war.

纽约时报排行榜畅销系列《Shatter Me》第五部，故事讲述女主人公朱丽叶拥有触碰便能杀人的能力，这既是危机也是机遇，她必须选择要成为一名战士或者一个致命武器。 Juliette and Warner's story continues in the thrilling fifth installment of Tahereh Mafi's New York Times bestselling Shatter Me series.Juliette Ferrars isn't who she thinks she is. Nothing in her world is what it seemed. She thought she'd finally defeated the Reestablishment. She thought she'd finally taken control of her life, her power, and her pain. But Juliette has only just begun to unravel a lifetime of lies, and she finds herself faced with a familiar choice: Be a weapon. Or be a warrior. This time, she's not alone. Stronger, braver, and more resilient than ever, Juliette will fight for life and love with her friends by her side—but first, she has to survive the war being waged against her mind:She has to remember who she was.Narrated by Juliette, Warner, and Kenji Kishimoto, this gripping novel perfectly sets the stage for the highly anticipated forthcoming conclusion to the Shatter Me series.

In this nail-biting sequel to Tehlor Kay Mejia’s critically acclaimed fantasy novel We Set the Dark on Fire, La Voz operative Carmen is forced to choose between the girl she loves and the success of the rebellion she’s devoted her life to. Perfect for fans of The Handmaid’s Tale and Anna-Marie McLemore.Being a part of the resistance group La Voz is an act of devotion and desperation. On the other side of Medio’s border wall, the oppressed class fights for freedom and liberty, sacrificing what little they have to become defenders of the cause. Carmen Santos is one of La Voz’s best soldiers. She spent years undercover, but now, with her identity exposed and the island on the brink of a civil war, Carmen returns to the only real home she’s ever known: La Voz’s headquarters.There she must reckon with her beloved leader, who is under the influence of an aggressive new recruit, and with the devastating news that her true love might be the target of an assassination plot. Will Carmen break with her community and save the girl who stole her heart—or fully embrace the ruthless rebel she was always meant to be?

Learn dynamic programming with Julia to build apps for data analysis, visualization, machine learning, and the web Key Features * Leverage Julia's high speed and efficiency to build fast, efficient applications * Perform supervised and unsupervised machine learning and time series analysis * Tackle problems concurrently and in a distributed environment Book Description Julia offers the high productivity and ease of use of Python and R with the lightning-fast speed of C++. There’s never been a better time to learn this language, thanks to its large-scale adoption across a wide range of domains, including fintech, biotech and artificial intelligence (AI). You will begin by learning how to set up a running Julia platform, before exploring its various built-in types. This Learning Path walks you through two important collection types: arrays and matrices. You’ll be taken through how type conversions and promotions work, and in further chapters you'll study how Julia interacts with operating systems and other languages. You’ll also learn about the use of macros, what makes Julia suitable for numerical and scientific computing, and how to run external programs. Once you have grasped the basics, this Learning Path goes on to how to analyze the Iris dataset using DataFrames. While building a web scraper and a web app, you’ll explore the use of functions, methods, and multiple dispatches. In the final chapters, you'll delve into machine learning, where you'll build a book recommender system. By the end of this Learning Path, you’ll be well versed with Julia and have the skills you need to leverage its high speed and efficiency for your applications. This Learning Path includes content from the following Packt products: * Julia 1.0 Programming - Second Edition by Ivo Balbaert * Julia Programming Projects by Adrian Salceanu What you will learn * Create your own types to extend the built-in type system * Visualize your data in Julia with plotting packages * Explore the use of built-in macros for testing and debugging * Integrate Julia with other languages such as C, Python, and MATLAB * Analyze and manipulate datasets using Julia and DataFrames * Develop and run a web app using Julia and the HTTP package * Build a recommendation system using supervised machine learning Who this book is for If you are a statistician or data scientist who wants a quick course in the Julia programming language while building big data applications, this Learning Path is for you. Basic knowledge of mathematics and programming is a must.

Design and implement professional-level programs by leveraging modern data structures and algorithms in Rust Key Features * Improve your productivity by writing more simple and easy code in Rust * Discover the functional and reactive implementations of traditional data structures * Delve into new domains of Rust, including WebAssembly, networking, and command-line tools Book Description Rust is a powerful language with a rare combination of safety, speed, and zero-cost abstractions. This Learning Path is filled with clear and simple explanations of its features along with real-world examples, demonstrating how you can build robust, scalable, and reliable programs. You’ll get started with an introduction to Rust data structures, algorithms, and essential language constructs. Next, you will understand how to store data using linked lists, arrays, stacks, and queues. You’ll also learn to implement sorting and searching algorithms, such as Brute Force algorithms, Greedy algorithms, Dynamic Programming, and Backtracking. As you progress, you’ll pick up on using Rust for systems programming, network programming, and the web. You’ll then move on to discover a variety of techniques, right from writing memory-safe code, to building idiomatic Rust libraries, and even advanced macros. By the end of this Learning Path, you’ll be able to implement Rust for enterprise projects, writing better tests and documentation, designing for performance, and creating idiomatic Rust code. This Learning Path includes content from the following Packt products: * Mastering Rust - Second Edition by Rahul Sharma and Vesa Kaihlavirta * Hands-On Data Structures and Algorithms with Rust by Claus Matzinger What you will learn * Design and implement complex data structures in Rust * Create and use well-tested and reusable components with Rust * Understand the basics of multithreaded programming and advanced algorithm design * Explore application profiling based on benchmarking and testing * Study and apply best practices and strategies in error handling * Create efficient web applications with the Actix-web framework * Use Diesel for type-safe database interactions in your web application Who this book is for If you are already familiar with an imperative language and now want to progress from being a beginner to an intermediate-level Rust programmer, this Learning Path is for you. Developers who are already familiar with Rust and want to delve deeper into the essential data structures and algorithms in Rust will also find this Learning Path useful.

Design clever algorithms that can uncover interesting structures and hidden relationships in unstructured, unlabeled data Key Features * Learn how to select the most suitable Python library to solve your problem * Compare k-Nearest Neighbor (k-NN) and non-parametric methods and decide when to use them * Delve into the applications of neural networks using real-world datasets Book Description Unsupervised learning is a useful and practical solution in situations where labeled data is not available. Applied Unsupervised Learning with Python guides you on the best practices for using unsupervised learning techniques in tandem with Python libraries and extracting meaningful information from unstructured data. The course begins by explaining how basic clustering works to find similar data points in a set. Once you are well versed with the k-means algorithm and how it operates, you’ll learn what dimensionality reduction is and where to apply it. As you progress, you’ll learn various neural network techniques and how they can improve your model. While studying the applications of unsupervised learning, you will also understand how to mine topics that are trending on Twitter and Facebook and build a news recommendation engine for users. You will complete the course by challenging yourself through various interesting activities such as performing a Market Basket Analysis and identifying relationships between different merchandises. By the end of this course, you will have the skills you need to confidently build your own models using Python. What you will learn * Understand the basics and importance of clustering * Build k-means, hierarchical, and DBSCAN clustering algorithms from scratch with built-in packages * Explore dimensionality reduction and its applications * Use scikit-learn (sklearn) to implement and analyse principal component analysis (PCA)on the Iris dataset * Employ Keras to build autoencoder models for the CIFAR-10 dataset * Apply the Apriori algorithm with machine learning extensions (Mlxtend) to study transaction data Who this book is for This course is designed for developers, data scientists, and machine learning enthusiasts who are interested in unsupervised learning. Some familiarity with Python programming along with basic knowledge of mathematical concepts including exponents, square roots, means, and medians will be beneficial.

Delve into the world of Kotlin and learn to build powerful Android and web applications Key Features * Learn the fundamentals of Kotlin to write high-quality code * Test and debug your applications with the different unit testing frameworks in Kotlin * Explore Kotlin's interesting features such as null safety, reflection, and annotations Book Description Kotlin is a general-purpose programming language used for developing cross-platform applications. Complete with a comprehensive introduction and projects covering the full set of Kotlin programming features, this book will take you through the fundamentals of Kotlin and get you up to speed in no time. Learn Kotlin Programming covers the installation, tools, and how to write basic programs in Kotlin. You'll learn how to implement object-oriented programming in Kotlin and easily reuse your program or parts of it. The book explains DSL construction, serialization, null safety aspects, and type parameterization to help you build robust apps. You'll learn how to destructure expressions and write your own. You'll then get to grips with building scalable apps by exploring advanced topics such as testing, concurrency, microservices, coroutines, and Kotlin DSL builders. Furthermore, you'll be introduced to the kotlinx.serialization framework, which is used to persist objects in JSON, Protobuf, and other formats. By the end of this book, you'll be well versed with all the new features in Kotlin and will be able to build robust applications skillfully. What you will learn * Explore the latest Kotlin features in order to write structured and readable object-oriented code * Get to grips with using lambdas and higher-order functions * Write unit tests and integrate Kotlin with Java code * Create real-world apps in Kotlin in the microservices style * Use Kotlin extensions with the Java collections library * Uncover destructuring expressions and find out how to write your own * Understand how Java-nullable code can be integrated with Kotlin features Who this book is for If you’re a beginner or intermediate programmer who wants to learn Kotlin to build applications, this book is for you. You’ll also find this book useful if you’re a Java developer interested in switching to Kotlin.

Take your SAP ABAP skills to the next level by mastering ABAP programming techniques with the help of real-world examples Key Features * Become adept at building interfaces and explore ABAP tools and techniques * Discover the modern functionalities available in the latest version of ABAP * Learn the process of creating stunning HTML5 applications using SAPUI5 Book Description Advanced Business Application Programming (ABAP) is an established and complex programming language in the IT industry. This book is designed to help you use the latest ABAP techniques and apply legacy constructions using practical examples. You'll start with a quick refresher on language and database concepts, followed by agile techniques for adding custom code to a modern ABAP system. After this, you will get up to speed with the complete ABAP toolset for importing data to and from different environments. Next, you'll learn how to print forms and work with the different ABAP tools for Extensible Markup Language (XML) manipulation. While covering further chapters, you'll gain insights into building stunning UI5 interfaces, in addition to learning how to develop simple apps using the Business Object Processing Framework (BOPF). You will also pick up the technique of handling exceptions and performing testing in ABAP. In the concluding chapters, you can look forward to grasping various techniques for optimizing the performance of programs using a variety of performance analysis tools. By the end of this book, you will have the expertise you need to confidently build maintainable programs in Systems, Applications, and Products (SAP). What you will learn * Create stable and error-free ABAP programs * Leverage new ABAP concepts including object-oriented programming(OOP) and Model-View-Controller (MVC) * Learn to add custom code to your existing SAP program * Speed up your ABAP programs by spotting bottlenecks * Understand techniques such as performance tuning and optimization * Develop modern and beautiful user interfaces (UIs) in an ABAP environment * Build multiple classes with any nesting level Who this book is for This book is for developers who want to learn and use ABAP skills to become an industry expert. Familiarity with object-oriented programming concepts is expected.

Build Prometheus ecosystems with metric-centric visualization, alerting, and querying Key Features * Integrate Prometheus with Alertmanager and Grafana for building a complete monitoring system * Explore PromQL, Prometheus' functional query language, with easy-to-follow examples * Learn how to deploy Prometheus components using Kubernetes and traditional instances Book Description Prometheus is an open source monitoring system. It provides a modern time series database, a robust query language, several metric visualization possibilities, and a reliable alerting solution for traditional and cloud-native infrastructure. This book covers the fundamental concepts of monitoring and explores Prometheus architecture, its data model, and how metric aggregation works. Multiple test environments are included to help explore different configuration scenarios, such as the use of various exporters and integrations. You’ll delve into PromQL, supported by several examples, and then apply that knowledge to alerting and recording rules, as well as how to test them. After that, alert routing with Alertmanager and creating visualizations with Grafana is thoroughly covered. In addition, this book covers several service discovery mechanisms and even provides an example of how to create your own. Finally, you’ll learn about Prometheus federation, cross-sharding aggregation, and also long-term storage with the help of Thanos. By the end of this book, you’ll be able to implement and scale Prometheus as a full monitoring system on-premises, in cloud environments, in standalone instances, or using container orchestration with Kubernetes. What you will learn * Grasp monitoring fundamentals and implement them using Prometheus * Discover how to extract metrics from common infrastructure services * Find out how to take full advantage of PromQL * Design a highly available, resilient, and scalable Prometheus stack * Explore the power of Kubernetes Prometheus Operator * Understand concepts such as federation and cross-shard aggregation * Unlock seamless global views and long-term retention in cloud-native apps with Thanos Who this book is for If you’re a software developer, cloud administrator, site reliability engineer, DevOps enthusiast or system admin looking to set up a fail-safe monitoring and alerting system for sustaining infrastructure security and performance, this book is for you. Basic networking and infrastructure monitoring knowledge will help you understand the concepts covered in this book.

Explore the aspects of financial modeling with the help of clear and easy-to-follow instructions and a variety of Excel features, functions, and productivity tips Key Features * A non data professionals guide to exploring Excel's financial functions and pivot tables * Learn to prepare various models for income and cash flow statements, and balance sheets * Learn to perform valuations and identify growth drivers with real-world case studies Book Description Financial modeling is a core skill required by anyone who wants to build a career in finance. Hands-On Financial Modeling with Microsoft Excel 2019 examines various definitions and relates them to the key features of financial modeling with the help of Excel. This book will help you understand financial modeling concepts using Excel, and provides you with an overview of the steps you should follow to build an integrated financial model. You will explore the design principles, functions, and techniques of building models in a practical manner. Starting with the key concepts of Excel, such as formulas and functions, you will learn about referencing frameworks and other advanced components of Excel for building financial models. Later chapters will help you understand your financial projects, build assumptions, and analyze historical data to develop data-driven models and functional growth drivers. The book takes an intuitive approach to model testing, along with best practices and practical use cases. By the end of this book, you will have examined the data from various use cases, and you will have the skills you need to build financial models to extract the information required to make informed business decisions. What you will learn * Identify the growth drivers derived from processing historical data in Excel * Use discounted cash flow (DCF) for efficient investment analysis * Build a financial model by projecting balance sheets, profit, and loss * Apply a Monte Carlo simulation to derive key assumptions for your financial model * Prepare detailed asset and debt schedule models in Excel * Discover the latest and advanced features of Excel 2019 * Calculate profitability ratios using various profit parameters Who this book is for This book is for data professionals, analysts, traders, business owners, and students, who want to implement and develop a high in-demand skill of financial modeling in their finance, analysis, trading, and valuation work. This book will also help individuals that have and don't have any experience in data and stats, to get started with building financial models. The book assumes working knowledge with Excel.

A step-by-step guide to learning Flutter and Dart 2 for creating Android and iOS mobile applications Key Features * Get up to speed with the basics of Dart programming and delve into Flutter development * Understand native SDK and third-party libraries for building Android and iOS applications using Flutter * Package and deploy your Flutter apps to achieve native-like performance Book Description Google Flutter is a cross-platform mobile platform that makes it easier to write secure and high-performance native apps for iOS and Android. This book begins by introducing you to the Flutter framework and basics of Dart. You’ll learn to set up the development environment to get started with your Flutter project. The book will guide you through designing the user interface and user input functions for your app. As you progress, you’ll explore the navigator widget to manage your app routes and understand how to add transitions between screens. You’ll then get to grips with developing your own plugin and discover how to structure good plugin code. The book will help you display a map from the Flutter app, add markers and interactions to it, and use the Google Places API. You’ll build on your knowledge by not only adding tests to create a bug-free app, but also preparing it for deployment on Apple's App Store and Google Play. In later chapters, you’ll learn to improve the user experience with advanced features such as map integrations, platform-specific code with native programming languages, and personalized animation options for designing intuitive UIs. By the end of this book, you’ll be well-versed with Dart programming and have the skills to develop your own mobile apps or build a career as a Dart and Flutter app developer. What you will learn * Understand the fundamentals of the Dart programming language * Explore the core concepts of the Flutter UI and how it compiles for multiple platforms * Develop Flutter plugins and widgets and understand how to structure good plugin code * Style your apps with widgets and learn the difference between stateful and stateless widgets * Add animation to your UI using Flutter's AnimatedBuilder component * Integrate your native code into your Flutter codebase for native app performance Who this book is for This book is for developers looking to learn Google's revolutionary framework, Flutter from scratch. No knowledge of Flutter or Dart is required. However, basic programming language knowledge will be helpful.

Sure to be hailed alongside H is for Hawk and The Hare with Amber Eyes, an exceptional work that is at once an astonishing journey across countries and continents, an immersive examination of a great artist’s work, and a moving and intimate memoir.In 2012, facing the death of his father and impending fatherhood, Toby Ferris set off on a seemingly quixotic mission to track down and look at—in situ—every painting still in existence by Pieter Bruegel the Elder, the most influential and important artist of Northern Renaissance painting.The result of that pursuit is a remarkable journey through major European cities and across continents. As Ferris takes a keen analytical eye to the paintings, each piece brings new revelations about Bruegel’s art, and gives way to meditations on mortality, fatherhood, and life. Ferris conjures a whole world to which most of us have probably lost the key, and in the process teaches us how to look, patiently and curiously, at the world.Short Life in a Strange World is a dazzlingly original and assured debut—a strange and bewitching hybrid of art criticism, philosophical reflection, and poignant memoir. Beautifully illustrated with sixty-six color images, it subtly alters the way we see the world and ourselves.

A collection of in-depth conversations with leading developer advocates that reveal the world of developer relations today Key Features * Top developer advocates reveal the work they’re doing at the center of their tech communities and the impact their advocacy is having on the tech industry as a whole * Discover the best practices of developer advocacy and get the inside story on working at some of the world’s largest tech companies * Features contributions from noted developer advocates, including Scott Hanselman, Sally Eaves, Venkat Subramaniam, Jono Bacon, Ted Neward, and more Book Description What exactly is a developer advocate, and how do they connect developers and companies around the world? Why is the area of developer relations set to explode? Can anybody with a passion for tech become a developer advocate? What are the keys to success on a global scale? How does a developer advocate maintain authenticity when balancing the needs of their company and their tech community? What are the hot topics in areas including Java, JavaScript, "tech for good," artificial intelligence, blockchain, the cloud, and open source? These are just a few of the questions addressed by developer advocate and author Geertjan Wielenga in Developer, Advocate!. 32 of the industry's most prominent developer advocates, from companies including Oracle, Microsoft, Google, and Amazon, open up about what it's like to turn a lifelong passion for knowledge sharing about tech into a rewarding career. These advocates run the gamut from working at large software vendors to small start-ups, along with independent developer advocates who work within organizations or for themselves. In Developer, Advocate!, readers will see how developer advocates are actively changing the world, not only for developers, but for individuals and companies navigating the fast-changing tech landscape. More importantly, Developer, Advocate! serves as a rallying cry to inspire and motivate tech enthusiasts and burgeoning developer advocates to get started and take their first steps within their tech community. What you will learn * Discover how developer advocates are putting developer interests at the heart of the software industry in companies including Microsoft and Google * Gain the confidence to use your voice in the tech community * Immerse yourself in developer advocacy techniques * Understand and overcome the challenges and obstacles facing developer advocates today * Hear predictions from the people at the cutting edge of tech * Explore your career options in developer advocacy Who this book is for Anybody interested in developer advocacy, the impact it is having, and how to build developer advocacy capabilities

“Reading Scratched gave me the feeling of standing very close to a blazing fire. It is that brilliant, that intense, and one of the finest explorations I know of what it means to be a woman and an artist.”—Sigrid Nunez, author of The Friend and Winner of the National Book Award for FictionIn a bold and brilliant memoir that reinvents the form, the acclaimed author of the novel Museum Pieces and the collection Mendocino Fire explores the ferocious desire for perfection which has shaped her writing life as well as her rich, dramatic, and constantly surprising personal life.Scratched is an intimate account of the uses a child, and the adult she becomes, will find for perfectionism and the role it will play in every part of her life. Elizabeth Tallent’s story begins in a hospital in mid-1950s suburban Washington, D.C., when her mother refuses to hold her newborn daughter, shocking behavior that baffles the nurses. Imagining her own mother’s perfectionist ideal at this critical moment, Elizabeth moves back and forth in time, juxtaposing moments in the past with the present in this innovative and spellbinding narrative.Elizabeth traces her journey from her early years in which she perceived herself as “the child whose flaws let disaster into an otherwise perfect family,” to her adulthood, when perfectionism came to affect everything. In the decade between 27 and 37, she publishes five literary books with Knopf and her short stories appear in The New Yorker. But this extraordinary start to her career is followed by twenty-two years of silence. She wrote, or rather published, nothing at all. Why? Scratched is the remarkable response to that question.Elizabeth’s early publications secure her a coveted teaching job at Stanford University. As she toggles between Palo Alto and the Mendocino coast where she lives, raises her son Gabriel, and pursues an important psychoanalysis, Elizabeth grapples with the perfectionism that has always been home to her. Eventually, she finds love and acceptance in the most unlikely place, and finally accepts an “as is” relationship with herself and others. Her final triumph is the writing of this memoir, filled with wit, humor, and heart, and unlike any other you will read. Scratched is a brave book that repeatedly searches for the emotional truth beneath the conventional surface of existence.

前《星期日泰晤士报》专栏作家多利 · 奥尔德顿处女作，这本回忆录讲述了成长、变老过程中渐渐学会如何处理工作、爱情、友谊、得失。作者真诚、幽默、充满智慧，她细腻和极具洞察力的描述会引起各个年龄段女性的共鸣，仿佛在看真实版的《BJ单身日记》 "There is no writer quite like Dolly Alderton working today and very soon the world will know it.”--Lisa Taddeo, author of #1 New York Times bestseller Three Women“Dolly Alderton has always been a sparkling Roman candle of talent. She is funny, smart, and explosively engaged in the wonders and weirdness of the world. But what makes this memoir more than mere entertainment is the mature and sophisticated evolution that Alderton describes in these pages. It’s a beautifully told journey and a thoughtful, important book. I loved it.”--Elizabeth Gilbert, New York Times bestselling author of Eat, Pray, Love and City of GirlsThe wildly funny, occasionally heartbreaking internationally bestselling memoir about growing up, growing older, and learning to navigate friendships, jobs, loss, and love along the rideWhen it comes to the trials and triumphs of becoming an adult, journalist and former Sunday Times columnist Dolly Alderton has seen and tried it all. In her memoir, she vividly recounts falling in love, finding a job, getting drunk, getting dumped, realizing that Ivan from the corner shop might just be the only reliable man in her life, and that absolutely no one can ever compare to her best girlfriends. Everything I Know About Love is about bad dates, good friends and—above all else— realizing that you are enough. Glittering with wit and insight, heart and humor, Dolly Alderton’s unforgettable debut weaves together personal stories, satirical observations, a series of lists, recipes, and other vignettes that will strike a chord of recognition with women of every age—making you want to pick up the phone and tell your best friends all about it. Like Bridget Jones’ Diary but all true, Everything I Know About Love is about the struggles of early adulthood in all its terrifying and hopeful uncertainty.

Twenty-five beautifully written stories, penned in exile, evocatively depicting life on a manor in feudal Russia and examining the conflicts between serfs and landlordsA Sportsman’s Notebook, Ivan Turgenev’s first literary masterpiece, is a sweeping portrayal of the magnificent nineteenth–century Russian countryside and the harsh lives of those who inhabited it. In a powerful and gripping series of sketches, a hunter wanders through the vast landscape of steppe and forest in search of game, encountering a varied cast of peasants, landlords, bailiffs, overseers, horse traders, and merchants. He witnesses both feudal tyranny and the submission of the tyrannized, against a backdrop of the sublime and pitiless terrain of rural Russia.These exquisitely rendered stories, now with a stirring introduction from Daniyal Mueenuddin, were not only universally popular with the reading public but, through the influence they exerted on important members of the Tsarist bureaucracy, contributed to the major political event of mid–nineteenth–century Russia: the Great Emancipation of the serfs in 1861. Rarely has a book that offers such undiluted literary pleasure also been so strong a force for significant social change, one that continues to speak to readers centuries later.

An engrossing debut novel that cannily reimagines the extraordinary life and mysterious death of bohemian Georgetown socialite Mary Pinchot Meyer— secret lover of JFK, ex-wife of a CIA chief, sexual adventurer, LSD explorer and early feminist living by her own rules.She was a longtime lover of JFK.She was the ex-wife of a CIA chief. She was the sister-in-law of the Washington Post’s Ben Bradlee.She believed in mind expansion and took LSD with Timothy Leary. She was a painter, a socialite and a Bohemian in Georgetown during the Cold War.And she ended up dead in an unsolved murder a year after JFK’s assassination.The diary she kept was never found.Until now. . . .

Winner of the New Mexico-Arizona Book Award for Historical FictionA Paperback OriginalFrom the author of A Dangerous Duet comes the next book in her Victorian mystery series, this time following a daring female painter and the Scotland Yard detective who is investigating her brother’s suspicious death.A young painter digs beneath the veneer of Victorian London’s art world to learn the truth behind her brother’s murder... Edwin is dead. That’s what Inspector Matthew Hallam of Scotland Yard tells Annabel Rowe when she discovers him searching her brother’s flat for clues. While the news is shocking, Annabel can’t say it’s wholly unexpected, given Edwin’s past as a dissolute risk-taker and art forger, although he swore he’d reformed. After years spent blaming his reckless behavior for their parents’ deaths, Annabel is now faced with the question of who murdered him—because Edwin’s death was both violent and deliberate. A valuable French painting he’d been restoring for an auction house is missing from his studio: find the painting, find the murderer. But the owner of the artwork claims it was destroyed in a warehouse fire years ago.As a painter at the prestigious Slade School of Art and as Edwin’s closest relative, Annabel makes the case that she is crucial to Matthew’s investigation. But in their search for the painting, Matthew and Annabel trace a path of deceit and viciousness that reaches far beyond the elegant rooms of the auction house, into an underworld of politics, corruption, and secrets someone will kill to keep.    

Don’t miss the epic and heart-pounding conclusion to Ted Sanders’s Keepers series!For centuries, the Keepers and the Wardens have been guarding the mysterious Mothergates, a source of incredible power. But now the Mothergates are dying, and Horace and his fellow Keepers know that the weakened gates may unleash a dangerous force that will consume the world—and destroy everyone in it.While their enemies are willing to take this careless risk, Horace and his friends are prepared to sacrifice themselves for the preservation of the world. With their strongholds destroyed and many of their friends captured, the Keepers’ chance of succeeding hangs by a thread.But all hope is not lost, as a mysterious talisman of power is discovered. It may hold the key to saving the universe . . . if they can unlock its secret in time.This fourth and final book in Ted Sanders’s gripping Keepers series brings Horace and Chloe’s story to a heart-pounding conclusion, where friendships are tested, dangers are faced, and the ultimate sacrifice must be made.

In Turbo Racers: Trailblazer, twelve-year-old Mace Blazer gets the chance to pilot a state-of-the-art vehicle that transforms at the touch of a button from race car to jet plane to single-person sub, in the biggest race in the world.The roar of the crowd, the glow of the spotlight, the thrill of the race—Mace Blazer dreams of going TURBO.TURBOnauts thrive on the thrum of trimorphers’s rocket engines as the vehicles morph from super-powered race cars to speeding jet aircrafts to torpedo-fast submarines, while they race full-throttle around every bend. And Mace believes he’s got what it takes to join their ranks—he only needs the chance to prove it.So when a reclusive retired racer chooses Mace to try out to be part of the next generation of TURBOnauts, Mace knows that this is his moment to show what he can do. But the path to his big shot means facing down the best and the brightest from around the world. Mace will have to live more fearlessly, hone quicker reflexes, be revolutionary—but will it be enough?Mace quickly realizes that everything he’s ever hoped for comes at a price. He’ll have to decide between what is right and what is easy. Every morph counts in the first book in this exhilarating new adventure series by the acclaimed author of The Islands at the End of the World, Austin Aslan.This is the first title in a high-stakes middle-grade two-book series!

Explore effective trading strategies in real-world markets using NumPy, spaCy, pandas, scikit-learn, and Keras Key Features *Implement machine learning algorithms to build, train, and validate algorithmic models *Create your own algorithmic design process to apply probabilistic machine learning approaches to trading decisions *Develop neural networks for algorithmic trading to perform time series forecasting and smart analytics Book Description The explosive growth of digital data has boosted the demand for expertise in trading strategies that use machine learning (ML). This book enables you to use a broad range of supervised and unsupervised algorithms to extract signals from a wide variety of data sources and create powerful investment strategies. This book shows how to access market, fundamental, and alternative data via API or web scraping and offers a framework to evaluate alternative data. You’ll practice the ML work?ow from model design, loss metric definition, and parameter tuning to performance evaluation in a time series context. You will understand ML algorithms such as Bayesian and ensemble methods and manifold learning, and will know how to train and tune these models using pandas, statsmodels, sklearn, PyMC3, xgboost, lightgbm, and catboost. This book also teaches you how to extract features from text data using spaCy, classify news and assign sentiment scores, and to use gensim to model topics and learn word embeddings from financial reports. You will also build and evaluate neural networks, including RNNs and CNNs, using Keras and PyTorch to exploit unstructured data for sophisticated strategies. Finally, you will apply transfer learning to satellite images to predict economic activity and use reinforcement learning to build agents that learn to trade in the OpenAI Gym. What you will learn *Implement machine learning techniques to solve investment and trading problems *Leverage market, fundamental, and alternative data to research alpha factors *Design and fine-tune supervised, unsupervised, and reinforcement learning models *Optimize portfolio risk and performance using pandas, NumPy, and scikit-learn *Integrate machine learning models into a live trading strategy on Quantopian *Evaluate strategies using reliable backtesting methodologies for time series *Design and evaluate deep neural networks using Keras, PyTorch, and TensorFlow *Work with reinforcement learning for trading strategies in the OpenAI Gym Who this book is for Hands-On Machine Learning for Algorithmic Trading is for data analysts, data scientists, and Python developers, as well as investment analysts and portfolio managers working within the finance and investment industry. If you want to perform efficient algorithmic trading by developing smart investigating strategies using machine learning algorithms, this is the book for you. Some understanding of Python and machine learning techniques is mandatory.