Cold Hit by Linda Fairstein

Try this if you’re a Patricia Cornwell fan.
Alexandra is a feisty Assistant District Attorney in New York, specialising in sex crimes. One evening she is called to view the body of an elegant woman which has been pulled from the water. She has been tied to a ladder and raped.
Cooper and her detective colleagues are plunged into the international art world of the dead woman. Their job is made harder by the fact that the victim’s marriage had broken down and she had two lovers. Or is the murder linked to a major art theft several years earlier?