Dirtbike daredevils /
Pam Withers.
- North Vancouver, B.C. : Walrus Books, c2006.
- 244 p. ; 18 cm.
- Take it to the xtreme .
- Withers, Pam. Take it to the xtreme. .
Two best friends spend their summer as dirt-bike trail guides and learn some hard lessons about motocross racing.