Michael Sandler 
Mighty MotoXers [PDF ebook] 

Kids won’t believe their eyes when they see the high-action intensity of MX competitions! Whether racing their motorcycles at breakneck speeds or performing stunts in midair, motocross riders take extreme sports to the max. Mighty Moto Xers follows the hottest stars of motocross today to explore the history, variations, major competitions, and most daring tricks of the sport. Fast-paced narratives and full-color photos will engage young readers in the excitement of this extreme adventure sport. A "gear page" shows the equipment and safety features used by pros and beginners alike.