While the title "The All-Food Diet" sounds somewhat tongue in cheek, it's about a serious topics that millions of people are concerned about, namely diet and health. The All-Food Diet is about eating healthy food. The catch is simple: buy foods with one ingredient and keep moving. Foods with one ingredient are good: rice, apples, milk. Food with many ingredients are bad: doritos, canned soup, frozen dinners. The latter tend to contain chemicals, salt, fat, grease, calories, and preservatives. The first part of the book discusses good and bad food, portion control, restaurants, and a healthy attitude towards food. Next comes being active in your every day routine, and being green. This is an easy diet to follow. Every suggestion in it is optional.