Martial Arts eBooks, Self Defense and Combat Sports eBooks PROMO 2x1. Pay 1 & Get 2. Discounts are automatically updated during the checkout process. Catalog of Martial Arts eBooks, Self Defense and Contact & Combat Sports in several languages. Books in PDF format. Instructional books on technique, training methods, history, principles, philosophy and tradition of Japanese Martial Arts, Chinese Martial Arts, Taekwondo, Jiu Jitsu, Samurai Arts, Aikido, Kyusho Pressure Points, JKD Jeet Kune Do, Arnis Kali Eskrima, ... with a long representation of renowned teachers and authors.