Friend of the Devil by Peter Robinson

A wheelchair-bound woman is found dead by the seaside, while a murdered female college student is discovered in The Maze, an area in Eastvale, Yorkshire that becomes dicey at night. DCI Alan Banks heads the investigation into the case of the student, Hayley Daniels. His colleague, DI Annie Cabbot, on loan to another police force, looks into the other death, the mysterious female with no identification on her. Soon it becomes evident that Annie's case is related to one that she and Banks worked on several years ago. It also appears that the two recent murders might be connected. The detectives share information as they interview witnesses, trying to wrap up their inquiries before there's another death. Since In a Dry Season, Robinson has written books that are beyond the standard British police procedural—multi-layered, with lots of insight into the personal lives of the detectives. Friend of the Devil will be published in February.