Family Ties

Less than four months ago Kat receive a mysterious letter the same night her parents were murdered. Now Kat's family is being slaughtered. Kat struggles with the losses and school; and when a mysterious boy shows up a week before school ends, Kat gets the feeling her life is going to get a lot harder... and that this boy will have something to do with it.
Kat wants answers and she will stop at nothing to find them. But her curiosity could get her in lots of trouble. What was the saying again? Curiosity killed the Kat?