The International Bestselling Fitness Book for Women Is this a workout book that can give you a lean and toned “Hollywood babe body” in 30 days flat? No. Is it a bodybuilding book full of dubious diet and exercise “hacks” and “shortcuts” for gaining lean muscle and melting belly fat faster than a sneeze in a cyclone? Absolutely not. But is it an exercise book (and nutrition book) that’ll show you exactly how to eat and exercise to lose up to 35 pounds of fat (or more) and gain eye-catching amounts of muscle definition and strength? Yes. 367 peer-reviewed scientific studies support the Thinner Leaner Stronger system of eating, exercising, and recovering for losing fat and gaining lean muscle and strength.