The Photographer (Book #1 D.I. Marsh series)

D.I. Angela Marsh is a hard hitting, no nonsense detective that is targeted by a serial psychopathic killer. The murderer displays the victims as pieces of art and offers to stop the killings if the detective agrees to trade places with the next target. D.I. Marsh has also to face her demons from her past as it comes to light that the killer is someone she knows. But who?