Into the Darkest Corner by Elizabeth Haynes

Cathy Bailey was in a relationship with an undercover cop named Lee, who almost killed her. Moving to London from Lancaster and trying to put her past behind her (despite near-crippling OCD) is a struggle--even three years later. Her new upstairs neighbor, Stuart Richardson, a clinical psychologist, has tremendous understanding of Cathy's condition. Their friendship gives Cathy the courage to get professional help for her problems. However, when Cathy receives a phone call that Lee is being released from prison, her anxiety level goes to an all-time high and she's convinced that she sees him everywhere. Cathy does, though, have the support of Stuart, who's now become more than a friend in her life. Alternating with Cathy's story in London is that of her harrowing past with Lee, up until the day that she gets free--which heightens the reader's fear that yes, Lee is someone who is unpredictable and violent and there's a very good chance that he will come for her again... Into the Darkest Corner is a debut novel that you'll want to gobble up in one sitting. Yes, it's that good. For people who enjoy Nicci French and Before I Go to Sleep by S.J. Watson. It will be published in June.