Rodrigo Gracie is the grandson of Brazilian jiu-jitsu founder Carlos Gracie, has a string of victories at ultimate fighting event Pride, and runs his own fighting academy. He is the author of No Holds Barred Fighting. He lives in New York City. Kid Peligro is the author of The Gracie Way and coauthor of Brazilian Jiu-Jitsu Black Belt Techniques, Brazilian Jiu-Jitsu Self-Defense Techniques, Brazilian Jiu-Jitsu Submission Grappling Techniques, and Superfit. He contributes regular columns to Bodyguard and Gracie Magazine. A black belt in jiu-jitsu, he travels the world as an ambassador for the sport. He lives in San Diego, California.