Murder and the Wanton Bride — Brett Halliday

A beachside slaying threatens to put Mike Shayne behind bars

No one at the hotel gives a damn about Walter Carson. There aren't any letters for him at the front desk or calls at reception. Bellboys, waiters, and bartenders all ignore him. When he reaches out to strangers, they look away. He's alone in the world -- and worse, he's gripped by an icy terror that follows him everywhere. One night, it catches up to him. Carson, unloved and unknown, is found dead with a bullet between his eyes.
 
In the dead man's pocket, the police find a newspaper clipping about Mike Shayne, Miami's toughest private investigator. The local chief is convinced Shayne was connected to the murder, and he will do whatever is necessary to put the detective behind bars. Shayne can handle the cops -- it's Carson's widow that he needs to worry about.
 
Murder and the Wanton Bride is the 30th book in the Mike Shayne Mysteries, but you may enjoy reading the series in any order.