Crowood Press ., — 2007 . — 191 p . — ISBN: 978-1-84797-370-2 Covering all aspects of the art of Ninjutsu , this book reveals the secrets of how to develop power through body movement and how to effectively remove an opponent's balance . A wide - ranging introduction looks at the history of Ninjutsu , as well as mental and physical attitude . Featuring additional subjects such as training advice and pressure points , this essential guidebook will promote harmony between the reader's mind and body , a balance rarely examined from a 1,000 - year - old martial arts perspective