Board to Death — Scott Lobdell

The undercover brothers, Frank and Joe Hardy, go undercover at a major skateboarding contest in Venice, California to find out which competitor is trying to kill off the competition-literally! The list of suspects includes Dex Thom, a skilled skateboarder whose parents wanted him to be a musical prodigy, the Pink Shadow, a girl of mystery, and her equally secretive trainer, Mr. Miyagi, and the Wraith, a dark and brooding young man. Will Frank and Joe solve the mystery before the killer discovers their real mission-and eliminates them?!