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An easy and readable guide to the latest scientific information on how and why to sleep better and improve your wellbeing. Why do we need to sleep? For those of who pass nights staring at the ceiling, the question is beside the point. In fact, we are all sleeping less, and worse, than ever. Despite this, we know that losing sleep or sleeping fitfully has consequences for our health and well being. What can we do when sleep just wont come? In nine fascinating chapters, Dr. Diane B. Boivin lays out exactly why sleeping well is essential to good health. She explains, in a clear and accessible way, the phenomena associated with sleep our individual sleep needs circadian rhythms and problems linked to our biological clocks the links between insomnia, stress, and obesity why those suffering from anxiety or depression can have trouble sleeping snoring sleep apnea night terrors and dreams, among others.