Libro de lucha con cuchillos y pistolas de Masaaki Hatsumi (traducción al inglés)

Although this book has an English translation it is laid out right to left and the translations are not on the same page as the pics so it takes some flicking to work out what is going on. The pics mainly show end points so you really need to know your taijutsu to have a good understanding of each technique. Would I buy it again, definitely. If you are not currently studying/practicing Bujinkan you would probably be wasting your money. However if you are a Bujinkan Buyu, 'Here be secret treasure'.