In a house in Oxford, three people are having breakfast: Carol, her husband Jan, and his father Josef. They are talking about Prague, because Carol wants them all to go there for Christmas. Josef was born in Prague, but he left his home city when he was a young man. He is an old man now, and he would like to see Prague again before he dies. But he is afraid. He still remembers another Christmas in Prague, many long years ago - a Christmas that changed his life forever.

Mr Ross lives on an island where no visitors come. He stops people from taking photographs of him. He is young and rich, but he looks sad. And there is one room in his house which is always locked. Carol Sanders and her mother come to the island to work for Mr Ross. Carol soon decides that there is something very strange about Mr Ross. Where did he get his money from? How can a young man buy an island? So she watches, and she listens - and one night she learns what is behind the locked door.

Witches are dangerous. They can kill you with a look, or a word. They can send their friend the Devil after you in the shape of a dog or a cat. They can make a clay picture of you, then break it.... and a few weeks later, you are dead. Today, of course, most people don’t believe in witches. But in 1612, everybody was afraid of them. Young Jennet Device in Lancashire knew a lot about them because she lived with the Witches of Pendle. They were her family.

Allegra is an unusual name. It means ’happy’ in Italian, but the little girl in this story is sometimes very sad. She is only five years old, but she tells Adrian, her new friend, that she is going to die soon. How does she know?And who is the other Allegra? The girl in a long white nightdress, who has golden hair and big blue eyes. The girl who comes only at night, and whose hands and face are cold, so cold.

In the mountains of Transylvania there stands a castle. It is the home of Count Dracula – a dark, lonely place, and at night the wolves howl around the walls. In the year 1875 Jonathan Harker comes from England to do business with the Count. But Jonathan does not feel comfortable at Castle Dracula. Strange things happen at night, and very soon, he begins to feel afraid. And he is right to be afraid, because Count Dracula is one of the Un-Dead – a vampire that drinks the blood of living people.

Astrophysicist Neil deGrasse Tyson has attracted one of the world’s largest online followings with his fascinating, widely accessible insights into science and our universe. Now, Tyson invites us to go behind the scenes of his public fame by unveiling his candid correspondence with people across the globe who have sought him out in search of answers. In this hand-picked collection of 100 letters, Tyson draws upon cosmic perspectives to address a vast array of questions about science, faith, philosophy, life, and of course, Pluto.

Richard Dawkins' brilliant reformulation of the theory of natural selection has the rare distinction of having provoked as much excitement and interest outside the scientific community as within it. His theories have helped change the whole nature of the study of social biology, and have forced thousands to rethink their beliefs about life.

Welcome to the Universe is a personal guided tour of the cosmos by three of today's leading astrophysicists. Inspired by the enormously popular introductory astronomy course that Neil deGrasse Tyson, Michael A. Strauss, and J. Richard Gott taught together at Princeton, this book covers it all - from planets, stars, and galaxies to black holes, wormholes, and time travel.

How the Earth Works takes you on an astonishing journey through time and space. In 48 lectures, you will look at what went into making our planet - from the big bang, to the formation of the solar system, to the subsequent evolution of Earth.

We are in the midst of a global mental health crisis, and mental illnesses are on the rise. But what causes mental illness? And why are mental health problems so hard to treat? Drawing on decades of research, Harvard psychiatrist Dr. Chris Palmer outlines a revolutionary new understanding that for the first time unites our existing knowledge about mental illness within a single framework: mental disorders are metabolic disorders of the brain. Brain Energy will transform the field of mental health, and the lives of countless people around the world.

Chemistry and Our Universe: How It All Works is your in-depth introduction to this vital field, taught through 60 engaging half-hour lectures that are suitable for any background or none at all. Covering a year’s worth of introductory general chemistry at the college level, plus intriguing topics that are rarely discussed in the classroom, this amazingly comprehensive course requires nothing more advanced than high-school math. Your guide is Professor Ron B. Davis, Jr., a research chemist and award-winning teacher at Georgetown University.

From launchpad explosions to a pernicious cricket infestation to the demanding management style of Musk himself, the rise of SpaceX was beset with challenges and far from inevitable. Find out how the startup beat the odds and flew high enough to outpace their rivals... and where they're going next.

From batting averages and political polls to game shows and medical research, the real-world application of statistics continues to grow by leaps and bounds. How can we catch schools that cheat on standardized tests? How does Netflix know which movies you'll like? What is causing the rising incidence of autism? As best-selling author Charles Wheelan shows us in Naked Statistics, the right data and a few well-chosen statistical tools can help us answer these questions and more.

The real stories behind the scenery of America’s national parks. For 12 years, Andrea Lankford lived in the biggest, most impressive national parks in the world, working a job she loved. She chaperoned baby sea turtles on their journey to sea. She pursued bad guys on her galloping patrol horse. She jumped into rescue helicopters bound for the heart of the Grand Canyon. She won arguments with bears. She slept with a few too many rattlesnakes. Hell yeah, it was the best job in the world! Fortunately, Andrea survived it.

How do today's most successful tech companies - Amazon, Google, Facebook, Netflix, Tesla - design, develop, and deploy the products that have earned the love of literally billions of people around the world? Perhaps surprisingly, they do it very differently from the vast majority of tech companies. In Inspired, technology product management thought leader Marty Cagan provides listeners with a master class in how to structure and staff a vibrant and successful product organization and how to discover and deliver technology products that your customers will love.