Martial arts are filled with ego. I talk to people from various martial arts on a weekly basis and what most of them have in common is they think their particular style is the best. Really it's a load of old bunk. I imagine the high rating for this book comes largely from people who train in Bujinkan Kobudo...and I imagine the 1 and 2 star ratings all come from people who do something else. This book has some limited value, but I don't think it deserves the high rating.