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Ruins

Kira, Samm, and Marcus fight to prevent a final war between Partials and humans in the gripping final installment in the Partials Sequence, a series that combines the thrilling action of *The Hunger Games* with the provocative themes of *Blade Runner* and *The Stand*.
There is no avoiding it—the war to decide the fate of both humans and Partials is at hand. Both sides hold in their possession a weapon that could destroy the other, and Kira Walker has precious little time to prevent that from happening. She has one chance to save both species and the world with them, but it will only come at great personal cost.
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Rspb Spotlight Frogs and Toads

***RSPB Spotlight: Frogs and Toads* * ***is packed with eye-catching, informative **** color **** photos and features succinct, detailed text written by Jules Howard, an acknowledged expert on these amphibians.**
They were bestowed with magical properties in folklore, sought-after ingredients of witches’ broth, and they are comic characters that have invaded popular culture, from Kermit the Frog to Toad of Toad Hall.
Frogs and toads are undoubtedly charismatic members of Britain’s wildlife, but what do you really know about them? Scratch beneath the surface, and you will discover some of nature’s weirdest creatures, amphibians whose ecology we are only now coming to understand. *Spotlight Frogs and Toads* is a compelling account of Britain’s four native amphibian species: the Common Frog, the Pool Frog, the widespread Common Toad and the rare and secretive Natterjack Toad.
Frogs and toads are on a downward spiral in the UK, and new research suggests that in the next ten years, three out of the four UK species are likely to be listed as threatened. They need help, and in addition to revealing a host of secrets, including how they migrate, what they eat, and how they got to the UK in the first place, Jules Howard outlines a fresh approach to conservation and inspires a generation of people to look down, rather than up, in spring.

Rocket Science

This is a book about rocket science: what it is and what it does. From the earliest fireworks to nuclear-powered spacecraft, all you would ever want or need to know about the subject is here, along with a straightforward explanation of how, why and when things work—or sometimes don’t.
We begin with the history and workings of early terrestrial rocketry before moving onto the main subject of the book: how we get things into space and, on occasion, back again. Entirely math-free, the chapters weave together innumerable anecdotes, real-world examples, and easy walk-throughs to help readers break down the complex physics behind some of humankind’s most amazing feats.
Neither a pure textbook nor a populist space travel tome, the book will educate, inform and above all entertain anyone intrigued by rocket science.

Report on Probability A

One afternoon in early January, the weather showed a lack of character. There was no frost nor wind: the trees in the garden did not stir. ” Within the house moved a woman, the strangely fascinating Mrs. Mary: without, a black and white cat stalked the pigeon known as X. The characters G, S, and C watched from various outbuildings. Others watched them and yet others watched those watchers. An enigmatic engraving hung in each outbuilding and as the early dusk fell C gazed at a representation of two snakes, each swallowing the other’s tail.
Brian Aldiss’s new novel, a tense and engrossing study of relative phenomena,is a dazzling tour-de-force in which his wit, intelligence and invention are displayed at full stretch.

Reinforcement Learning Algorithms With Python

**Develop self-learning algorithms and agents using TensorFlow and other Python tools, frameworks, and libraries**
#### Key Features
* Learn, develop, and deploy advanced reinforcement learning algorithms to solve a variety of tasks
* Understand and develop model-free and model-based algorithms for building self-learning agents
* Work with advanced Reinforcement Learning concepts and algorithms such as imitation learning and evolution strategies

#### Book Description
Reinforcement Learning (RL) is a popular and promising branch of AI that involves making smarter models and agents that can automatically determine ideal behavior based on changing requirements. This book will help you master RL algorithms and understand their implementation as you build self-learning agents.
Starting with an introduction to the tools, libraries, and setup needed to work in the RL environment, this book covers the building blocks of RL and delves into value-based methods, such as the application of Q-learning and SARSA algorithms. You’ll learn how to use a combination of Q-learning and neural networks to solve complex problems. Furthermore, you’ll study the policy gradient methods, TRPO, and PPO, to improve performance and stability, before moving on to the DDPG and TD3 deterministic algorithms. This book also covers how imitation learning techniques work and how Dagger can teach an agent to drive. You’ll discover evolutionary strategies and black-box optimization techniques, and see how they can improve RL algorithms. Finally, you’ll get to grips with exploration approaches, such as UCB and UCB1, and develop a meta-algorithm called ESBAS.
By the end of the book, you’ll have worked with key RL algorithms to overcome challenges in real-world applications, and be part of the RL research community.
#### What you will learn
* Develop an agent to play CartPole using the OpenAI Gym interface
* Discover the model-based reinforcement learning paradigm
* Solve the Frozen Lake problem with dynamic programming
* Explore Q-learning and SARSA with a view to playing a taxi game
* Apply Deep Q-Networks (DQNs) to Atari games using Gym
* Study policy gradient algorithms, including Actor-Critic and REINFORCE
* Understand and apply PPO and TRPO in continuous locomotion environments
* Get to grips with evolution strategies for solving the lunar lander problem

#### Who this book is for
If you are an AI researcher, deep learning user, or anyone who wants to learn reinforcement learning from scratch, this book is for you. You’ll also find this reinforcement learning book useful if you want to learn about the advancements in the field. Working knowledge of Python is necessary.

Redouté’s Fabulous Flowers

Pierre-Joseph Redouté (1759–1840) ranks among the most highly regarded botanical illustrators in history. Known as the “Raphael of Flowers” for his meticulously accurate watercolors of roses, lilies, and other flowers, Redouté dominated botanical art from 1790 to 1830. The official court artist for Louis XVI and art tutor to Marie Antoinette, he survived the Terror and received the patronage of Napoleon’s wife, Empress Josephine.
Today the appreciation of Redouté’s masterworks is no longer limited to aristocratic circles. Hailed by botanists for their scientific accuracy and by lovers of fine art for their peerless beauty, the artist’s floral illustrations appear in reproductions in millions of homes around the world. This original compilation presents 80 exquisite renderings of his finest works, with each image accompanied by a brief caption. In addition to its value as a reference for artists, this lushly illustrated volume is a wonderful companion for nature lovers.

Reclaimed Wood

The first handbook on reclaimed wood, combining useful information, rich history, and design ideas 

Wood reclaimed from old houses, factories, barns, water tanks, and boardwalks has become a valuable commodity, treasured for the patina that gives witness to its history. Our ancestors built well, using locally sourced lumber that expressed the culture and natural history of their region: oak and pine in the Northeast; hickory and cypress in the South; Douglas fir and redwood in the West. Reclaimed Wood: A Field Guide is the first complete visual handbook to this popular resource, covering history, culture, salvage, sources, contemporary uses (in buildings and furniture), and practical advice.

Reborn

Return to the beloved world of Shadow Falls, a camp that teaches supernatural teens to harness their powers—and where a vampire named Della will discover who she’s meant to be.
For Della Tsang, Shadow Falls isn’t just a camp: it’s home. As a vampire who’s never fit in with her human family, it’s the one place she can truly be herself. But when a mysterious new guy arrives at camp, Della’s whole world is thrown into turmoil. Chase is a vampire with secrets, who knows more than he’s telling. But the more time she spends with him, the more she begins to trust this attractive stranger—and feel drawn to him. But romance is the last thing she wants—as she keeps telling Steve, the hunky shapeshifter who won’t stop trying to win her heart. And if Della isn’t careful, he just might succeed.  When a new case puts everyone she cares about in danger, Della’s determined to do everything she can to save them . . . even if it means teaming up with Steve and…

Rebel Fay

Desperate to free his mother from a caste of ruthless elven assassins, Leesil joins his beloved Magiere, the sage Wynn, and their canine protector, Chap, on a difficult journey through mountains and harsh winter. Should they survive the hardships of wilderness, they still face the perils of the mysterious Elven Territories. Unbeknownst to them, they’ve been united at the command of Chap’s Fay kin to forge an alliance against the forces of dark magic. But now Chap must guard his companions from enemies and allies-not always certain which is which. And as they uncover the truth, they discover just how close the enemy has always been.

Real-World Bug Hunting

**Learn how people break websites and how you can, too.**
*Real-World Bug Hunting* is the premier field guide to finding software bugs. Whether you’re a cyber-security beginner who wants to make the internet safer or a seasoned developer who wants to write secure code, ethical hacker Peter Yaworski will show you how it’s done.
You’ll learn about the most common types of bugs like cross-site scripting, insecure direct object references, and server-side request forgery. Using real-life case studies of rewarded vulnerabilities from applications like Twitter, Facebook, Google, and Uber, you’ll see how hackers manage to invoke race conditions while transferring money, use URL parameter to cause users to like unintended tweets, and more.
Each chapter introduces a vulnerability type accompanied by a series of actual reported bug bounties. The book’s collection of tales from the field will teach you how attackers trick users into giving away their sensitive information and how sites may reveal their vulnerabilities to savvy users. You’ll even learn how you could turn your challenging new hobby into a successful career. You’ll learn:
• How the internet works and basic web hacking concepts
• How attackers compromise websites
• How to identify functionality commonly associated with vulnerabilities
• How to find bug bounty programs and submit effective vulnerability reports
*Real-World Bug Hunting* is a fascinating soup-to-nuts primer on web security vulnerabilities, filled with stories from the trenches and practical wisdom. With your new understanding of site security and weaknesses, you can help make the web a safer place–and profit while you’re at it.

Reader’s Digest Extraordinary Uses for Ordinary Things New Edition

An updated edition, now fully illustrated and in color, of the classic guide to using common household items to replace, restore, repair, or revive almost anything in your household—including yourself.
When you have a household problem, don’t run to the store and waste good money, just open your pantry door—and EXTRAORDINARY USES FOR ORDINARY THINGS. You’ll be amazed at what you can do with baby oil, bleach, duct tape, tea, rubbing alcohol, and dozens of other handy items. This book will open your eyes to more than 2,000 creative and helpful uses you can make of familiar household products, such as:

  • Aspirin can revive a dead car battery and a coating of petroleum jelly will keep the battery’s terminals from corroding

  • A dab of shaving cream can keep your bathroom mirror from fogging and can remove juice stains on carpeting

  • Petroleum jelly makes a great lip balm, makeup remover, and moisturizer

  • A turkey baster is the…