Need a good night's rest? This practical guide by one of the world's leading sleep authorities offers solutions for sleeping soundly and healthily. Find out about the human body's natural rhythms, the nature of sleep and dreams, the different types of insomnia that commonly afflict people, and how changes to your attitude, patterns, and environment can make a difference. There's a directory of sleeping pills and potions, from pharmaceuticals to herbal teas, and specific, targeted sleep routines for certain lifestyles—worker, athlete, student, traveler, and more—so you can choose the right one for you.