Rising Moon — Lori Handeland

Over a city of wicked pleasures and dangerous passions...
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...

There's a bad moon on the rise.
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...