In a world where 95% of diets fail, one scientist set out to discover what we're really capable of. His book answers a seminal question every overweight person has asked themselves: If I really buckled down and tried to get in shape, just what could I accomplish? Armed only with his wits and a desire to lose weight, our intrepid author—geneticist Noah Walton—transformed himself from a 341-pound blimp into an elite athlete.