Dojo Press ., — 2000 . — 85 p . — ISBN: 0-87364-234-1 Ashida Kim is one of a handful of men in the world who have learned the true art of Ninjitsu , the Silent Way of stealth and assassination in feudal Japan . Initial attempts to bring these secrets to the public were met with stiff resistance due to the brutal nature and terrifying effectiveness of the techniques . Now , some thirty years later , it has become a martial art classic . The Ninja can fight or disappear . Looked for , cannot be seen , listened for , cannot be heard , felt for , cannot be touched . Now , you too can become a master of invisibility with the ability to penetrate anywhere unseen and vanish without leaving a trac