Grind (Paperback) by Eric Walters

Philip lives for skateboarding. School is merely the break between trying to land a difficult jump and outrunning the security guards. When he and his best friend Wally meet a professional skateboarder who videotapes himself for his website, Philip thinks they can do it too--and make money at the same time. When they start getting hits on their website--and making money--they start to feel the pressure to do more and more dangerous stunts.

Also available in Spanish or French.