It is not the case at all. They are giving you incorrect information. Here is something that may help. Watch out for the twist and turns though. It's like someone writing a book about Abraham Lincoln. They include the Gettsburg Address in their book and we get an arguement that the writer of the book wrote the Gettsburg Address and not Lincoln. It was Lincoln stating 4 score - 7 years ago....... It was Masaaki Hatsumi, Soke of Toga....Ryu Ninjutsu, who defines what Ninjutsu is to his Ryu and its students. If his students don't want to accept his writings, so be it. Ask them if Masaaki Hatsumi receives Royalties from the book. Ask them if all this debate keeps going on because sojobow quoted their Soke. The words of the insert are those of Masaaki Hatsumi. http://japanbookplaza.com.au/shop/product_info.php/manufacturers_id/263/products_id/590 http://www.reviewcentre.com/reviews19872.html http://www.ukmao.co.uk/proddetail.asp?prod=500-105 http://www.amazon.com/exec/obidos/tg/detail/-/0865680272/104-4388744-9055901?v=glance Books by Masaaki Hatsumi: Essence of Ninjutsu The Grandmaster's Book of Ninja Training Stick Fighting Books by Stephen Hayes: The Mystic Arts of the Ninja Ninjutsu Secrets from the Ninja Grandmaster: Revised and Updated Edition. Guess which ones by Stephen Hayes were Co-authored by Masaaki Hatsumi?