This book examines sleep-related phenomena, including individual sleep needs, problems related to the biological clock, why people who suffer from chronic anxiety or depression often sleep poorly, snoring and sleep apnea, among others. Special attention is paid to sleep disturbances affecting night workers and new mothers.

Diane B. Boivin is a researcher of problems related to sleep and circadian rhythms, Associate Editor of the journal Sleep, and winner of the Gold Medal of the Governor General of Canada for her research. She lives in Montreal.