A Defense Manual of Commando Jiu Jitsu by Irvin Cahn is a comprehensive guide to the martial art of Commando Jiu Jitsu. This book is designed for individuals who want to learn how to defend themselves in hand-to-hand combat situations. The book covers a wide range of techniques, including striking, grappling, joint locks, and throws. It also includes information on how to use common objects as weapons, such as belts, pens, and keys. The author, Irvin...