Authored by Dr. Masaaki Hatsumi This incredible book includes a series of very rare interviews with the Grandmaster of Ninja, plus countless rare photos demonstrating the use of an umbrella Naginata and more! The content of this relevant and historic volume makes it one of the most interesting and valuable books in Ninja history, with 100 pages of great, inside information rarely ever taught or shown outside of old Japan. This comprehensive text is a must read for anyone interested in the secrets of Japanese assassin Ninja. 306 pages. 6" x 9".