Ken Dachman weighed 115 lbs. at age six; at 16, he devised this sound, low-calorie diet, bolstered by behavior-mod techniques, and lost 235 lbs. (410 to 175). In addressing others severely overweight, he stresses the need to recognize and overcome ""every emotional obstacle that could possibly get in the way of achieving your weight loss goal."" (His own childhood, as related here, was a dismal ordeal--including, finally, treatment in a psychiatric ward.) Bachman begins with self-assessment tests (""what kind of overeater are you""), advice on interpreting different types of hunger, and ""Thin-Person Transformation"" exercises to alter your body image. He takes up the devastating/sabotaging reactions of family and friends to the serious dieter. He provides basic nutritional advice, menus, and recipes--all balanced and reasonable. The exercise tips are brief and routine--except for some special ""tensercises"" to minimize the loose-skin problem after colossal weight-loss. Nothing startling or exciting, in toto (newer approaches, emphasizing exercise-with-diet and leaning away from the behavior-mod approach, are more on track); but extra-companionable for those with large amounts of weight to lose.