If you are a student of jujitsu (also spelled jujutsu), judo, aikido or karate, or if you're a fan of the martial arts in general, this book by Black Belt Hall of Famer George Kirby is for you. It will help you connect the dots between numerous martial arts concepts and techniques. It deals with the theory and application of circular movement to redirect an opponent's attack quickly and effectively with minimal effort on your part. You will learn how to use an opponent's momentum against him in devastating fashion through appropriate application of his — and your — ki, or internal energy. You also will learn about kuzushi (off-balancing) and proper positioning of your saiki tanden (center). The bottom line: Maximizing the elements of circular movement results in fast and effective control during an attack or self-defense situation.