Masaaki Hatsumi
Complete Ninja
Ninjutsu
The Way of the Ninja
Ninjutsu history and tradition
The Grandmaster's Book of Ninja Training
Advanced Stick Fighting
Essence of Budo
Japanese Sword Fighting
Rompecabezas Ninja
Stick Fighting
Stick Fighting: Techniques of Self-Defense (Bushido--The Way of the Warrior)
The grandmaster's book of ninja training