"A 'landmark book.'"--The New York Times
*When the dark days of winter approach, do you feel sluggish and slow? Is it a struggle to get out of bed each morning?
*Do you have difficulty focusing at work or in relationships, feel down in the dumps, or, worse still, get really depressed?
*Does it get harder than ever to stick to a healthy diet and control your weight? If you answered yes to one or more of these questions, you...