Every great player knows that success in poker is part luck, part math, and part subterfuge. While the math of poker has been refined over the past 20 years, the ability to read other players and keep your own "tells" in check has mostly been learned by trial and error. But now, Joe Navarro, a former FBI counterintelligence officer specializing in nonverbal communication and behavior analysis—or, to put it simply, a man who can tell when someone's lying—offers foolproof techniques, illustrated with amazing examples from poker pro Phil Hellmuth, that will help you decode and interpret your opponents' body language and other silent tip-offs while concealing your own. You'll become a human lie detector, ready to call every bluff—and the most feared player in the room.