The Science of Sleep teaches us the vital importance of sleep and how it determines our mental and physical health. It explores the neuroscience of sleep and cultural, social, and political aspects of how people view sleep and are affected by sleep. The author receives no royalties from this book. Your purchase is to cover only the expense of printing. The Science of Sleep is an open educational resource (OER) and is available as a free printable PDF or a free EPUB (for kindle, Apple Books, etc) if you go to https://open.umn.edu/opentextbooks/textbooks/1200. The option to purchase this book from Amazon is available for people who prefer to have a paperback book. For another book by this author, go to Herbs and Nutrients for Neurologic Disorders.