Book excerpt: Poker columnist, psychotherapist and author James A. McKenna goes deep into the psychology of poker, revealing how to use the psychological patterns that govern opponents to trap them into making mistakes. McKenna explains how consistent winners use different bait for different prey and how they trap and avoid traps by noticing the difference between players at the table. McKenna demonstrates the different approaches needed for different personalities, outlining the traps for each, and shows readers how to take their game to a higher level.