A.J. and the Ella Mentry School gang learn some unusual self-defense moves from a wacky teacher who thinks he is an action hero -- Publisher.

Examines the history and philosophy of Japanese martial arts and gives instruction in a variety of related self-defense techniques.

Full-color photographs and detailed explanations introduce readers to the basic principles behind several kinds of martial arts, including tae kwon do and judo. Step-by-step instructions teach simple moves, such as snap kicks and hammerfist strikes.