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“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.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).

Vygotsky’s sociocultural theory of cognitive development in his own words—collected and translated by an outstanding group of scholars.“A landmark book.” —Contemporary PsychologyThe great Russian psychologist L. S. Vygotsky has long been recognized as a pioneer in developmental psychology. But his theory of development has never been well understood in the West. Mind in Society corrects much of this misunderstanding. Carefully edited by a group of outstanding Vygotsky scholars, the book presents a unique selection of Vygotsky’s important essays, most of which have previously been unavailable in English.The mind, Vygotsky argues, cannot be understood in isolation from the surrounding society. Humans are the only animals who use tools to alter their own inner world as well as the world around them. Vygotsky characterizes the uniquely human aspects of behavior and offers hypotheses about the way these traits have been formed in the course of human history and the way they develop over an individual's lifetime.From the handkerchief knotted as a simple mnemonic device to the complexities of symbolic language, society provides the individual with technology that can be used to shape the private processes of the mind. In Mind in Society Vygotsky applies this theoretical framework to the development of perception, attention, memory, language, and play, and he examines its implications for education. The result is a remarkably interesting book that makes clear Vygotsky’s continuing influence in the areas of child development, cognitive psychology, education, and modern psychological thought.Chapters include:1. Tool and Symbol in Child Development2. The Development of Perception and Attention3. Mastery of Memory and Thinking4. Internalization of Higher Psychological Functions5. Problems of Method6. Interaction between Learning and Development7. The Role of Play in Development8. The Prehistory of Written Language