Actually the author worked pretty hard to paint an over all picture of the life of Takamatsu Sensei. While being far from perfect and not an authorized biography from Hatsumi Sensei I still think it has value!
Most of the sources are from Hatsumi Sensei in the end and it would appear that he did not make anything up but instead showed how life was and events that happened based on the writings from other books. An interesting read if nothing else.
The author took already existing material available on Takamatsu-sensei and played a very liberal game of connect the dots through history. I have no doubt the he spent considerable time compiling snippets of information. I wish he had spent even more time confirming facts and presenting them in a more professional manner.
Value is a subjective quality. Had I known what I would be getting I would have bought the book on eBay for $5.00 instead of the authors website for considerably more. I found the finished product very disappointing.