The Shape of Snakes by Minette Walters

I love the way this woman writes! She creates an amazing sense of psychological suspense. The book is narrated by Mrs. Ranelaigh (now that I think of it, I'm not sure I ever found out her first name!), who moves back to England with her family 20 years after a woman was killed right outside her house. At first you think nothing of this, but then you start to realize that this woman is bent on either revenge, or justice (she's been convinced that the victim was murdered, but she could not convince anyone else of it at the time.) The book makes great use of the "unreliable narrator" concept. I had a hard time putting it down. In short, I've never met a Minette Walters book that I didn't like. Give her a try!