Sword Techniques of Musashi and the Other Samurai Masters Book by Fumon Tanaka
The book opens with an introduction to Musashi as a real-life figure, not just the legend we've come to know. Musashi was born in 1584, a time of transition in Japan that saw centuries of violence and war give way to an era of peace. In his early years, Musashi studied kenjutsu (the technique of the sword) and trained as a warrior. Before he turned thirty, he had fought and won sixty-six duels, proving himself a truly gifted swordsman. When he was in his thirties, however, warriors were no longer called upon to do battle, and many, like Musashi, turned to the inner secrets and theories of kenjutsu as a way to find a deeper meaning to life. He became a first-class painter and wrote Zen poetry. By 1629, he had gone back to his ronin (masterless warrior) ways, and opened a kenjutsu dojo, where he taught two-sword fighting, the technique he perfected although didn't invent, as is widely believed. In 1643, when he was sixty years old, Musashi wrote his classic work, The Book of Five Rings.
In the second chapter of the book, Tanaka introduces Musashi's major rivals, while the last two chapters go into great detail about the various traditional martial arts systems including the development and characteristics of each, as well as the techniques themselves.
The long history of Japan is also the history of the martial arts, which evolved from swordsmanship. And since the mental, spiritual, and physical aspects are inseparable, an exploration of traditional martial arts is also a look at the very essence of Japanese culture.