Steve Badillo has coauthored three top-selling skateboarding guides, including Skateboarder's Start-Up, Skateboarding: Book of Tricks, and Skateboarding: New Levels. He has worked as a stunt double and actor in numerous commercials and films featuring skateboarding, including Lords of Dogtown. He lives in Ventura, California. Doug Werner has coauthored five skateboarding guides and a dozen other sport-instruction guides, including the Start-Up Sports® series. He lives in Chula Vista, California.