Twenty-five unhappy books for Valentine’s Day

At B&N Reads Tara Sonin tagged twenty-five unhappy books for Valentine’s Day. One entry on the list:
In the Woods, by Tana French

Mystery writer extraordinare French’s novel about a detective who returns to the town in which he himself was the survivor of a violent crime to investigate another. But the present is often a mirror of the past, and he finds himself growing unstable in the proximity