If you're interested in professional gambling and/or watching Spike TV's King of Vegas series the book Jonny Magic and the Card Shark Kids by David Kushner may be of interest to you. It tells the story of Jon Finkel, a New Jersey geek who used the card game Magic: The Gathering to find a place in life for himself before expanding his horizons into the world of professional gambling. One of the "characters" in the book is David Williams, who he met via Magic and who like Finkel has gone on to gamble professionally. Williams is one of the current contestants on King of Vegas.