True Path of the Ninja: The Definitive Translation of the Shoninki (An Authentic Ninja Training Manual)
The Book of Ninja: The Bansenshukai - Japan's Premier Ninja Manual
Samurai and Ninja: The Real Story Behind the Japanese Warrior Myth that Shatters the Bushido Mystique
Secrets of the Ninja: The Shinobi Teachings of Hattori Hanzo
The Book of Samurai: Book One: Fundamental Teachings
In Search of the Ninja: The Historical Truth of Ninjutsu
Shoninki: The Secret Teachings of the Ninja: The 17th-Century Manual on the Art of Concealment
The Seven Military Classics Of Ancient China (History and Warfare)
The Complete Book of Five Rings