Murder at the Beautiful Lady — Terry Ward

Nick DiPaulo is a hotshot FBI agent celebrating the close of a big case with a night of booze and his boss's eighteen year-old sister-in-law. After having a couple of thugs rough him up, Nick's boss sends him on a do-nothing stakeout designed to see that he never gets a chance to make it big again. That is, until bodies start dropping around him and the sexy mobster's mistress he's been assigned to watch. It looks like an easy case to solve and he could get that gold-edged invitation back to DC if he plays it by his boss's rules, but then, Nick has never been one to play by the rules.