"In this book, readers can follow the movements of a wide array of animals -from the grizzly bear to the red-sided garter snake to the hummingbird - as they prepare for dormant periods that may last an entire season or just a few hours. In clear, vivid language, the author explores the mysteries of sleep, the deep winter slumber known as hibernation, and the dormant summertime state called estivation, and the reasons they are so important for survival. Beautiful detailed pencil drawings, combine with the entertaining and instructive text to provide a unique glimpse into this fascinating aspect of the animal world." taken from inside the front flap of the dust cover.