Shadows of Frenchmen: A Jonathan Gray, M.D. Mystery: 2

On a frosty Sunday morning in February, Dr. Jonathan Gray, Coroner of Orleans Parish, faces a gruesome sight. A dead man splayed against the circular steel and cut-glass blocks of the city's AIDS memorial in Washington Square Park has strange symbols carved into his forehead and chest. A coded note-a cipher-has been placed under one hand. The body mutilation and note are hallmarks of a serial killer dubbed by the news media as the "Mardi Gras Sweeper," because he strikes during Carnival season and leaves coded manifestos taunting police and giving hints about his next victim. Hoping to avoid a panic during the city's most profitable season, Mayor Max Jamerson asks Gray to investigate the murder "on the sly," without formal assistance from the New Orleans Police Department. Time is of the essence as Gray races to figure out the cipher and track down the Sweeper in order to prevent additional killings-and save Mardi Gras.