Books help, but they can never replace training with a teacher. Here are some places to start: 📖 Ninjutsu: History and Tradition, by Masaaki Hatsumi 📖 Essence of Ninjutsu: The Nine Traditions, by Masaaki Hatsumi 📖 The Book of Ninja, a translation of the Bansenshukai 📖 True Path of the Ninja, a translation of the Shoninki 📖 The Book of Five Rings, by Miyamoto Musashi 📖 The Art of War, by Sun Tzu Ask your teacher what they recommend. Search Shinobi-Kai Stoke to learn more