Book excerpt: This fascinating reference covers the major topics concerning dreaming and sleep, based on the latest empirical evidence from sleep research as well as drawn from a broad range of dream-related interdisciplinary contexts, including history and anthropology. While many books have been written on the subject of sleep and dreams, no other resource has provided the depth of empirical evidence concerning sleep and dream phenomena nor revealed the latest scientific breakthroughs in the field. Encyclopedia of Sleep and Dreams: The Evolution, Function, Nature, and Mysteries of Slumber explores the evolution, nature, and functions of sleep and dreams. The encyclopedia is divided into two volumes and is arranged alphabetically by entry. Topics include nightmares and their treatment, how sleep and dreams change across the lifetime, and the new field of evolution of sleep and dream. While this book includes ample material on the science of sleep and dreams, content is drawn from a broad range of disciplinary contexts, including history and anthropology.