Michael Kilian 
Postcard from Hell [EPUB ebook] 

A back-alley murder carries André Derain from the streets of New Orleans to the sun-drenched hell of the Cayman Islands It’s quiet in the Garden District, and André Derain can’t sleep. After a lifetime as a fashion photographer in New York and the French Quarter, he needs noise, excitement, action—and he’s about to get more than he can handle. A call comes in from the New Orleans homicide department, tipping Derain off to a grisly shooting on Tchoupitoulas Street. He grabs his camera and charges out the door. The night has just begun.   The victim was the pretty-boy son of a local gangster who flies into a rage when Derain tries to sell the crime-scene photos to the local tabloids. With the entire criminal underworld of New Orleans at his throat, Derain is desperate for a vacation. He’ll have to settle for a very deadly trip to the Caribbean.  Postcard from Hell is the 2nd book in the Andy Derain Mysteries, but you may enjoy reading the series in any order.