: The Collection: The Book: Roy Dean is a world class martial artist and acclaimed instructor, with black belts in Kodokan Judo, Aikikai Aikido, Seibukan Jujutsu, and Brazilian Jiu Jitsu. With over 25 years of experience, Dean is able to explain powerful insights into the art of jiu jitsu. Check out these resources to learn more: The Book: iPhone Apps: Android Apps: http://bit
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