This is the fourth book ( Feeding the Hungry Heart, etc.) generated by the seminars Roth conducts at her Berkeley, Calif., home for people who believe that if they were thin, they would be happy. But the author makes clear that losing weight doesn't automatically gain one success, respect and love. Roth's personal story and those of her clients as related here exemplify the need to discover why the overweight are addicted to food. Citing her own deprived childhood, the author demonstrates that gluttons seek the reliable comforts of eating instead of closeness with humans who might become abusive (like her mother) or vanish (like her father). Those bent on self-improvement will find that the book merely repeats well-known principles in a melodramatic fashion.