Written by my new friend Ellis Amdur, this is a fantastic look inside the world of traditional Japanese martial arts and traditions.  Ellis has a writing style that shows the importance and validity of these historical arts in a modern world, in a way that fascinates, entertains, and educates.  I highly recommend this book to anyone who wants to truly understand all aspects of martial methods.  Ellis is a highly respected master instructor of Japanese martial arts, and has published other excellent books and media that can be reviewed on the same link.