Into the Darkest Corner was very suspenseful and difficult to put down. The writing flowed and the characters were well-rounded and believable. The antagonist was terrifying, and the protagonist was well-rounded. It was clear that the author did her research into OCD and PTSD, as well as the law enforcement component of her novel. The main character, Cathy, gave a fairly accurate portrait of someone with OCD and PTSD, and it was exciting to watch her triumph over some of her symptoms in a realistic way. There was a secondary romantic plot, but it felt like it belonged and was relevant to the main plot. It did not feel cliche or thrown in.

I also thought that the way the author handled the inter-weaving of past and present was brilliant. It allowed both stories to unfold simultaneously, while revelations of the past provided the structure of understanding for thought patterns of the present.

Overall, this book was highly realistic and quite terrifying. The conclusion was satisfying. The language was crisp and clear. I would recommend this book to anyone who likes realistic suspense that does occasionally feel quite scary. I am eager to read more of Haynes' work.