"Dr. ""Willett,"" head of the Harvard School of Public Health's Department of Nutrition and best-selling author of ""Eat,"" Drink & Be ""Healthy,"" teams up with the creator of the four million-copy best-seller Moosewood Cookbook. Their medically ""sound,"" yet flexible and adaptable weight loss program works by adding delicious food to your diet and making simple changes in what you eat throughout the day. A quiz helps readers determine their ""Body"" ""Score,"" which they can improve by following easy dietary and behavioral steps."