Into the Darkest Corner is a suspense novel, mostly narrating back and forth between Catherine in the past and Cathy in the present. The interesting thing is, although they have vastly different lives and seem like totally different people, they are one and the same. As the book goes along, we see what changed her, a dangerous and manipulative abusive relationship. It sounds like it's kind of Sleeping with the Enemy, but it's really not, it's more psychological, especially dealing with Cathy's untreated OCD, which was ruining her life as much as the man did. Her neighbor was a weird character, not fully fleshed out, inconsistent and perhaps at times a bit of a red herring. Catherine, especially in the beginning, was super annoying and it was also half shocking and half sad to see how quickly her life could be ruined by one person and her friends could side against her. I would give it between three and four stars, but I think I'll round up. Good narration and looking at issues of abusive relationships, PTSD and OCD.