The Art of Natural Sleep

"The Art of Natural Sleep" by Lyman P. Powell is one of the first examples of a self-help manual for better sleep. Written to help readers combat insomnia, Powell discusses the techniques that worked for him. It first introduces the commonly held theories at the time of what happens when one sleeps, why sleep is important, and what causes insomnia before Powell writes about the suggestions he has to help improve one's sleep health. Considered to be a great advancement in the field of accessible healthcare resources at the time, this book is still at the root of many sleep theories over a century later.