This work surveys sleep from psychological, physiological, practical, and moral perspectives, blending practical advice with discussion of theory and history. It addresses how much and when to sleep, causes of wakefulness such as pain and habit, and nonpharmacological methods for inducing rest, including fresh air, breathing, diet, natural living, and behavioral routines. It examines dreams, hypnotic sleep, and the special needs of invalids, critiques reliance on opiates, and explores how fear, worry, and social or economic conditions shape rest. Throughout it stresses habit formation, simplicity, and harmony with natural law as means to restore refreshing, healthful sleep.