Last Call by Tim Powers
Twenty years ago Scott Crane abandoned his career as a professional poker player and went into hiding, after a weird high-stakes game played with Tarot cards. But now the cards - and the supernatural powers behind them - have found him again.
Crane's father killed gangster Bugsy Siegel in 1948 to become the Fisher King, and to keep that power he is determined to kill his son. Now Scott Crane must cross the Mojave Desert to his father's Perilous Chapel in Las Vegas, and take up the cards again for one last poker duel. And the stakes are the highest he's ever played for ... his soul.