Short book of Food Eating Principles. The kind of rules your grandma would tell ya. Food Rules is separated into three parts, What should I eat? (Eat food), What kind of food should I eat? (Mostly plants) and How should I eat? (Not too much). The book gives a rule and a short paragraph explaining it, a handy reference book that keeps it simple. Food Rules, covers the "What", but lacks on the Why and How, which is better addressed in the authors other books "In Defense of Food", and "The Omnivore's Dilemma".
I read Michael Pollan's In Defense of Food and enjoyed that and thought that Food Rules would be another good book, as a reference and principle based nature. It's a short book, packed with wisdom.