Rising Moon (Nightcreature, Book 6)

Denizens of The Big Easy know its steamy nights can hide any number of sins and secrets. Private-eye Anne Lockhart is counting on it. Her life has been in a holding pattern ever since her sister Katie disappeared without a trace…but when a clue leads Anne to a jazz club in the French Quarter, everything changes. Rising Moon's proprietor, John Rodolfo, is mysterious in his own right, a gifted musician who reaches deep into Anne's soul and whose mere presence taps into desires she can't afford to indulge...
 
By going undercover at the Rising Moon, Anne can get close to people who know what goes on after dark--people like John, whose nocturnal disappearances are more than a little suspicious. But unlocking John's secrets is harder than Anne had anticipated. What's far too easy is surrendering to him. And now someone--or something--is stalking the innocent and the guilty, and waiting for Anne's next move...