The Book of Five Rings is an amazing insight into the mind of one of the greatest warriors in human history. Miyamoto, or "sword saint" as the Japanese call him, was both a powerful warrior and a deep thinking philosopher. He produced numerous works of art, including self-portraits, paintings of buddhas, and sword tsubas. The depth of his thought can be seen clearly in this philosophical treatise, a must read for anyone who is serious about combat and the philosophy behind combat. However, the reader be warned that this is not a martial arts "how to book." Miyamoto fails to divulge any specific sword techniques, only describing strikes, stances, and sword positioning at a most basic level. Having said this, the work is centered around the philosophy behind combat and killing. The most powerful weapon is the human mind which Miyamoto attempts to begin training with this fantastic work. It is a book that can and should be read again and again by both beginners and experts: it never fails to yield some bit of philosophy that helps strengthen the mind. While what Miyamoto says on numerous occasions is mind bending, such as his section on fighting and defeating fifty to sixty men, and difficult to fully grasp this is a work that I think everyone should read sometime in their life and should be required reading in every dojo.