Sleep is one of the most important aspects of our life, health and longevity and yet it is increasingly neglected in twenty-first-century society, with devastating consequences: every major disease in the developed world - Alzheimer's, cancer, obesity, diabetes - has very strong causal links to deficient sleep.

In this book, the first of its kind written by a scientific expert, Professor Matthew Walker explores twenty years of cutting-edge research to solve the mystery of why sleep matters. Looking at creatures from across the animal kingdom as well as major human studies, Why We Sleep delves into everything from what really happens during REM sleep to how caffeine and alcohol affect sleep and why our sleep patterns change across a lifetime, transforming our appreciation of the extraordinary phenomenon that safeguards our existence.

A New York Times bestseller and international sensation, this “stimulating and important book” (Financial Times) is a fascinating dive into the purpose and power of slumber.

With two appearances on CBS This Morning and Fresh Air's most popular interview of 2017, Matthew Walker has made abundantly clear that sleep is one of the most important but least understood aspects of our life. Until very recently, science had no answer to the question of why we sleep, or what good it served, or why we suffer such devastating health consequences when it is absent. Compared to the other basic drives in life—eating, drinking, and reproducing—the purpose of sleep remains more elusive.

Within the brain, sleep enriches a diversity of functions, including our ability to learn, memorize, and make logical decisions. It recalibrates our emotions, restocks our immune system, fine-tunes our metabolism, and regulates our appetite. Dreaming creates a virtual reality space in which the brain melds past and present knowledge, inspiring creativity.

In this “compelling and utterly convincing” (The Sunday Times) book, preeminent neuroscientist and sleep expert Matthew Walker provides a revolutionary exploration of sleep, examining how it affects every aspect of our physical and mental well-being. Charting the most cutting-edge scientific breakthroughs, and marshalling his decades of research and clinical practice, Walker explains how we can harness sleep to improve learning, mood and energy levels, regulate hormones, prevent cancer, Alzheimer’s and diabetes, slow the effects of aging, and increase longevity. He also provides actionable steps towards getting a better night’s sleep every night.

Clear-eyed, fascinating, and accessible, Why We Sleep is a crucial and illuminating book. Written with the precision of Atul Gawande, Andrew Solomon, and Sherwin Nuland, it is “recommended for night-table reading in the most pragmatic sense” (The New York Times Book Review).

"Why We Sleep is an important and fascinating book...Walker taught me a lot about this basic activity that every person on Earth needs. I suspect his book will do the same for you." --Bill Gates A New York Times bestseller and international sensation, this "stimulating and important book" (Financial Times) is a fascinating dive into the purpose and power of slumber. Sleep is one of the most important but least understood aspects of our life, wellness, and longevity. Until very recently, science had no answer to the question of why we sleep, or what good it served, or why we suffer such devastating health consequences when we don't sleep. Compared to the other basic drives in life--eating, drinking, and reproducing--the purpose of sleep remained elusive. An explosion of scientific discoveries in the last twenty years has shed new light on this fundamental aspect of our lives. Now, preeminent neuroscientist and sleep expert Matthew Walker gives us a new understanding of the vital importance of sleep and dreaming. Within the brain, sleep enriches our ability to learn, memorize, and make logical decisions. It recalibrates our emotions, restocks our immune system, fine-tunes our metabolism, and regulates our appetite. Dreaming mollifies painful memories and creates a virtual reality space in which the brain melds past and present knowledge to inspire creativity. Walker answers important questions about sleep: how do caffeine and alcohol affect sleep? What really happens during REM sleep? Why do our sleep patterns change across a lifetime? How do common sleep aids affect us and can they do long-term damage? Charting cutting-edge scientific breakthroughs, and synthesizing decades of research and clinical practice, Walker explains how we can harness sleep to improve learning, mood, and energy levels; regulate hormones; prevent cancer, Alzheimer's, and diabetes; slow the effects of aging; increase longevity; enhance the education and lifespan of our children, and boost the efficiency, success, and productivity of our businesses. Clear-eyed, fascinating, and accessible, Why We Sleep is a crucial and illuminating book.

Architects, Builders, and Intellectual Culture in Restoration England charts the moment when well-educated, well-resourced, English intellectuals first became interested in classical architecture in substantial numbers. This occurred after the Restoration of the Monarchy in 1660 and involved people such as John Evelyn, Robert Hooke, Sir Christopher Wren, and Roger North. Matthew Walker explores how these figures treated architecture as a subject of intellectual enquiry, either as writers, as designers of buildings, or as both. In four substantial chapters it looks at how the architect was defined as a major intellectual figure, how architects acquired material that allowed them to define themselves as intellectually competent architects, how intellectual writers in the period handled knowledge of ancient architecture in their writing, and how the design process in architecture was conceived of in theoretical writing at the time. In all, Walker shows that the key to understanding English architectural culture at the time is to understand how architecture was handled as knowledge, and how architects were conceived of as collectors and producers of such knowledge. He also makes the claim that architecture was treated as an extremely serious and important area of intellectual enquiry, the result of which was that by the turn of the eighteenth century, architects and architectural writers could count themselves amongst England's intellectual and cultural elite.

This book provides a case-based illustrative approach to the understanding and management of common and important sleep disorders, including snoring and sleep disordered breathing, insomnia and circadian-rhythm disorders, as well as primary neurological sleep disorders. Case histories are written by well-established experts from University College London Hospitals who have long-standing experience of providing a multi-disciplinary approach to the management of sleep disorders. Cases focus on the recognition of presenting features of sleep disorders and their clinical importance, using real life patients from sleep clinic. Each case report provides a detailed clinical description followed by a clear explanation of the salient points. The text is supported by photographs, diagrams and line drawing and concludes with a list of key learning points. Each case history reads as stand-alone, although a common theme of presenting features, clinical features, investigation and treatment is adhered to. Cases are written in an easy-flowing prose style in an attempt to simulate the experience of seeing and discussing a real life patient case in clinical practice. The book is of interest to all clinicians who are likely to come across patients with sleep disorders in their clinical practice and wish to improve their understanding and knowledge of sleep disorders.

Have you ever wondered how others have reached their goals? Have you ever wanted to be more present and engaged? Have you ever wanted your life to be filled with adventure? Most of us have. It's important to note, though, that you don't need to climb Mount Everest, row across the Pacific Ocean, swim the English Channel, or ski to the North Pole to experience a life of adventure. In reality, finding it is a lifestyle choice that reconnects you with your dreams and passions. In "Adventure in Everything", you'll learn a framework for making changes guaranteed to weave excitement and a sense of possibility into every single day. Whether it's finding a dream job, discovering a way to turn old responsibilities into new passions, enhancing your most significant relationships or constructing a completely different way of being in this world, you have the potential for a life infused with exciting possibilities. With "Adventure in Everything", you will discover this for yourself.