High Quality Content by WIKIPEDIA articles! Henry Wilson Cook (born 1949), widely known as Harry Cook, is a British martial artist, teacher, and author. He has written several martial art books, most notably Shotokan Karate: A precise history (2001). Cook began training in karate in 1966, and is currently the Chief Instructor of the Seijinkai Karatedo Association, a school he founded to teach his own style of karate. He holds the rank of 7th dan in karate.