Despite its prevalence, insomnia remains poorly understood because of the lack of clear scientific data supporting the many treatment approaches used. This book is the first to collate the up-to-date scientific data in order to identify the gaps in knowledge and improve clinical management. A highly distinguished team of contributors examines the most recent findings and identifies where research should be heading. They cover the nature and prevalence of insomnia throughout the lifespan; the molecular, neuropharmacological and neuroanatomical systems of relevance to insomnia; and the impact of related problems (such as shift work, industrial accidents, mood disorders, and other sleep disorders).