These are all symptoms of sleep deficiency—signals that you are operating below your peak performance and beneath your mental capacity. Despite popular perceptions, sleep is not a luxury—it is a necessity. More than seventy million Americans are sleep-deprived, and make crucial business and personal decisions in an impaired state. In , Dr. James B. Maas, a pioneer of sleep research at Cornell University, has created an easy, drug-free program to improve your body and mind for an alert and productive tomorrow. In , you'll find: An important and practical book, will help you get the sleep you need to improve your mental and physical well-being quickly and dramatically and to become a peak performer.