The International Bestselling Workout Book for Men Is this a bodybuilding book that can help you pack on brain-shrinking amounts of muscle in 30 days flat? No. Is it a fitness book that’s full of dubious diet and exercise “hacks” and “shortcuts” for melting belly fat faster than a roided hornet? Absolutely not. But is it an exercise book (and nutrition book) that’ll show you exactly how to eat and exercise to gain 25-to-35 pounds of lean muscle and lose just as much fat (or even more)? Yes. -338 peer-reviewed scientific studies support the Bigger Leaner Stronger system of eating, training, and recovering for losing fat and building muscle and strength.