It explains the underlying truths necessary for a full understanding of Musashi's message for warriors. The result is an enthralling book on military strategy that combines the instincts of the warrior with the philosophies of Zen Buddhism, Shintoism, Confucianism and Taoism. It is a crucial book for every martial artist to read and understand. Like the original, this classic book of strategy is divided into five sections. The Book of Earth lays the groundwork for anyone wishing to understand Musashi's teachings; the Book of Water explains the warrior's approach to strategy; the Book of Fire teaches fundamental fighting techniques based on the Earth and Water principles; the Book of Wind describes differences between Musashi's own martial style and the styles of other fighting schools; while the Book of No-thing describes the "way of nature" as understood through an "unthinking" existing preconception.