I HAVE STUDIED AND RESEARCHED THE MARTIAL ARTS FOR MANY YEARS , IT ALL BEGAN WHEN I WAS IN MY EARLY TEENAGE YEARS. THAT WAS THE MAJOR INFLUENCE FORMY SECOND BOOK ,WHICH IS TITLED ....WORLD OF MARTIAL ARTS. I COVER A WIDE VARITY OF MARTIAL ARTS STYLES AND THEIR HISTORY, SUCH AS KARATE,JIU-JITSU,NIN-JITSU,AIKIDO,JUDO,SUOM,KUNGFU,TAICHI, AND MUCH MORE !