Under the Harrow by Flynn Berry
Nora and Rachel are very close; Nora tells Rachel everything and is sure Rachel shares everything with her. But when Nora goes to visit her sister in the Yorkshire countryside and finds Rachel murdered she decides to start digging in to her sister’s life to figure out who killed her. That’s when Nora starts discovering more and more secrets about her sister and gets closer to figuring out why she was killed.
The author does a great job with misdirection, I really thought I knew what was going on a few times, just to find out I was wrong. The author makes you start thinking some really dark thoughts and then Nora has her aha! moment (and we have it right along with her) and all starts to make sense.
Fans of dead ends and thrillers that concentrate on motive will enjoy this short, yet not sweet, story.