Like earlier entries in this AMA series, this is a comprehensive, accurate, and meticulous guide--here, to the medical understanding of sleep. Those merely obsessed with the subject will find answers to every conceivable physiological question; those suffering from any one of the many sleep disorders will find simple self-help and medical treatment measures. The text is divided simply into ""Normal Sleep,"" ""Troubled Sleep,"" and ""Better Sleep."" The introduction, however, targets specific chapters for those with problems falling or staying asleep (insomnia in general, or sleeping pills, or mental troubles, or specific measures to take); those with problems staying awake (narcolepsy, mental troubles again); and those with problems that occur during sleep (dreams, how illness may affect sleep). Altogether, it's chock-full of the latest findings from the very active sleep-research field, so even the unaffected will find plenty of interest. (Heart patients, it's been established, may experience chest pain during anxious dreams; they can now be treated with drugs which suppress the REM, or dreaming stage of sleep.) The latest, most complete word on the subject--with solid advice for those with sleep disturbances.