Wrong Place, Wrong Time (Rafferty) by W. Glenn Duncan
Boy, these Rafferty books are fun! As much as they seem to owe to Spenser I enjoy the hell out of them. In this one Rafferty is asked by the girl he frequently ogles in an adjacent office (hmm that sounds a bit creepy) to help her great-uncle who is being harassed by some vandals. Meanwhile he is tracking down a guy who pretended to be a bounty hunter in an effort to have Rafferty along killing a pool cleaner.
The stakes aren't all that high and the mystery might not be that strong but the dialogue is just awesome. There's some very touching bits between Rafferty and the great-uncle and Cowboy is just one of the coolest sidekicks ever.
If you're in for an awesome, light classic PI read you need to pick this one up.