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Dr. Walker is the author of the International Bestseller, Why We Sleep. It has a singular goal: to reunite humanity with sleep.


The book provides a complete description of, and prescription for, sleep. It answers critical questions about sleep: how do caffeine and alcohol affect sleep? What really happens during dreaming? Why do our sleep patterns change across a lifetime? How do common sleep pills affect us and can they do long-term damage?


Charting cutting-edge scientific breakthroughs, and synthesizing decades of research and clinical practice, Why We Sleep explains how we can harness sleep to improve learning, mood, and energy levels; regulate hormones; prevent cancer, Alzheimer’s, obesity 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.


The book concludes with a provocative new vision for sleep in the modern world, one that aims to solve the greatest public-health challenge we now face: the global sleep-loss epidemic. 


Why We Sleep was recently selected for the prestigious Sundance Book Festival. It has been translated into over 40 different languages. Why We Sleep can be found at all major books stores in the US (Scribner) and UK (Penguin Random House), and ordered online at Amazon, Barnes & Noble, and WaterstonesShould you be interested in contacting Dr. Walker, please email WME by clicking here

Since the publication of the first edition, fascinating and thoughtful questions have been offered regarding the book, including a number of noted errors that required revision. As an essential part of what I see to be good scholarly conduct, I have made corrections to the book, published in a second edition, and is now out in print. I have also written a detailed blog post, found here, that discusses numerous questions about sleep and aspects of the book. 

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