Books like The Way of the Ninja by Masaaki Hatsumi

"Ninja Attack! introduces dozens of unforgettable real-life ninja straight out of the annals of Japanese history--many of whom are all but unknown outside their home country. Ninja masters. Solo assassins and operatives. Femme fatales as deadly as they were sexy. Swordfighters out of legend. And the Shogun and warlords who commanded them. Each individual is profiled with a full-page manga-style drawing and a dossier brimming with top-secret information, including photos, anecdotes, and dramatic stories of the individuals in action. The book covers ninja clothing styles, the types of weapons that were used, ninja tools, ninja tricks of the trade, and the basics of the ninja diet. It also includes a do-it-yourself tour of ninja related spots in modern Tokyo. Ninja Attack! is the product of years of research, and the result is engaging and fun for all. It's everything you always wanted to know about ninja but were too afraid you'd get a shuriken in the eye to ask"--

Dr. Masaaki Hatsumi, 34th grandmaster of ninjutsu, traces the 900‑year history of the Iga ninja traditions, combining historic scrolls, anecdotes from past grandmasters, and practical self‑defense techniques to show how the art endures worldwide.