I loved reading Mr Hayes' books in the 80's. I have rediscovered them and are reading them all over again. There are interesting. However, I have recently heard that a lot in them are not reflective of the Bujinkan and are mostly just the philosophies of Mr Hayes. I understand that (other than Sanchin) Mr Hayes made up the GoDai perspectives on fighting and that is not done in the Bujinkan. I have also heard that a lot of the spiritual aspects of the books are his interpetations and not the Bujinkans. Can anyone enlighten me on the matter?