Grift sense - James Swain

The Acropolis is a casino that has seen better days: it's quickly falling out of pace with the rest of Las Vegas. Its one big tourist attraction is One-Armed Billy, a cigar-store Indian turned slot machine. When a blackjack player starts to win consistently against the casino, the owner gets suspicious and calls in crusty Tony Valentine to investigate. A sixty-two-year-old retired cop with a unique understanding of the mechanics of high-stakes gambling, wonderfully misanthropic Tony also specialises in spotting and hunting down "grifters".
Valentine soon finds himself embroiled in a fascinating but lethal world of hustlers, hit men and corrupt police, and he'll need more than luck to come out of it alive.