I don't know what the reviewer from NZ is reviewing, but it's not Black Belt Management. I have read and referred to this book over and over again. There is no mention of Graden Publishing anywhere in this book. On the cover, Graden Media is the publisher and I saw no typos, just a tried and true system that has helped my school and God knows how many others since it was first published before he created NAPMA, which basically launched the industry as we know it.
John Graden runs the Martial Arts Teachers' Association now and has written many other books on the subject of running a school. This is a very industry specific book with information that I have not found in any other book. This is not business 101 with martial arts sprinkled in. This is a book by a martial artist about the martial arts business. If you can only get one book on the subject, this is it.