The Ninja were quite a mysterious and legendary force that eventually became part of some popular_culture merchandising & entertainment. http://en.wikipedia.org/wiki/Ninja_films
http://en.wikipedia.org/wiki/Ninjutsu
Its nice to see that some serious research has been done on this subject.
http://authorsplace.co.uk/john-man, http://www.coasttocoastam.com/guest/man-john
