|By Robert K. Spear. #360. 6 X 9, 192 pages, paperback. ISBN #0-86568-079-5. Hapkido, the 'way of coordinated power' is a total Martial Art, containing the throwing secrets of Judo, the striking aspects of Karate, and the locking and breaking aspects of Aikido. This is the definitive work on this multifaceted system, considered by many to be Korea's deadliest fighting art.