Now You See Me by S.J. Bolton

DC Lacey Flint has just finished interviewing a witness when she comes upon a woman bleeding to death against her car. Unable to save her life, Lacey is traumatized. Soon, however, Lacey is helping with the investigation. The killer seems to be imitating Jack the Ripper and also mentions Lacey by name in a letter to a reporter. The police know they only have a little time before the murderer strikes again. To complicate matters, Lacey is attracted to (and on guard with) fellow officer DI Mark Joesbury. The case also causes Lacey to reflect upon a past that she wants to remain hidden. In Now You See Me, S.J. Bolton has written a police procedural that keeps the reader guessing and turning the pages right up until the end. It's reminiscent of Belinda Bauer's Darkside, Giles Blunt's By the Time You Read This, Tana French, Minette Walters, Elena Forbes, Susan Hill's mysteries, and Val McDermid's non-series mysteries. The characters are rich and complex and there's plenty of historical detail about Jack the Ripper and London (which features prominently as a character). This is possibly the best mystery I will read this year. Here's hoping this becomes a regular series...