Xtreme UFC follows the thrilling action of today's most exciting professional mixed martial arts stars. The Ultimate Fighting Championship (UFC) organization has produced dozens of champions over its 17-year history. Inside the Octagon focuses on the rules, techniques, and history of the sport. UFC fights are held in an eight-sided ring, called the octagon. Reader interest is enhanced with quotes, statistics, action-packed photos and short, easy-to-read bursts of text. Glossary words provide additional information and understanding to the curious reader. A&D Xtreme is an imprint of Abdo Publishing, a division of ABDO.