In recent years, the grappling arts have proven to be the most effective form of combat in mixed martial arts (MMA) and no-holds-barred (NHB) competitions. Above all others, the Gracie brand of Brazilian jujitsu has become recognized as the preeminent fighting style in unarmed combat. Now Renzo Gracie—instructor; competitor; and champion of numerous grappling, MMA, and NHB events—reveals the inner workings of the art in his latest book, Mastering Jujitsu.