Here, for the first time, is an in-depth, factual look at the entire art of ninjutsu, including emergence of the ninja warriors and philosophy in feudal Japan; detailed historical events; its context in the development of other schools of martial arts; and the philosophies and exercises of the school today.

Based on more than ten years of study and translation of authentic Japanese texts, including many that have never before been translated, this is the most comprehensive and accurate study on the art of ninjutsu ever written outside of Japan. This ninja book includes studies of ninjutsu...