This book is another testimony diet book with the theme of ``how I changed my life by not going on another diet.'' The authors state that through slow, gradual changes in exercise and eating, weight can be lost and kept off for life. They contend that the diet treadmill is one of the reasons why chronic dieters cannot lose weight; their bodies have become highly efficient at saving energy, which translates into a slowed metabolism. This plan calls for increasing exercise through a brisk walking program and a reduction of foods high in fat and sugar. With such a snappy title, a little more originality in content might have been expected. Not a necessary purchase.-- Susan E. Holmer, Peninsula Lib. System, San Mateo, Cal.