That old black magic / Mary Jane Clark.

Enhanced descriptions from Syndetics:

That Old Black Magic is New York Times bestselling author Mary Jane Clark's savory and suspenseful confection filled with murder, mystery, history and voodoo, in which Piper Donovan must unmask a devious killer striking in New Orleans's legendary French Quarter.

Aspiring actress and wedding-cake decorator Piper Donovan has barely arrived in New Orleans to perfect her pastry skills at the renowned French Quarter bakery, Boulangerie Bertrand, when a ghastly murder rocks the magical city. Intrigued by the case, Piper can't help but look for the "Hoodoo Killer" among the faces around her. Could it be the handsome guide eager to give her special private tours? Or the inscrutable jazz musician who plays on historic Royal Street? What about the ratings-starved radio talk-show host? Or even the amiable owner of the local Gris-Gris Bar?

Though Piper has a full plate decorating cakes for upcoming wedding celebrations, she's also landed an exciting but unnerving role in a movie being shot in the Big Easy. When the murderer strikes again, leaving macabre clues, she thinks she can unmask the killer. But Piper will have to conjure up some old black magic of her own if she hopes to live long enough to reveal the truth.