Master of Martial Arts

From publisher blurb: You and your best friend, Billy, have traveled the world together, sharpening your martial-arts skills. So when Billy mysteriously disappears one night, you don your black belt and set out to find him. Your search takes you to the exotic city of Bangkok, where you suddenly find yourself surrounded by a band of Thai fighters. Across the street, a strange woman beckons to you frantically. Is she inviting you to safety or a swift, horrible death? The fighters are closing in. What will you do?