Prep school + murder = perfect book combo

I'm already a fan of the "Gossip Girl" vibe and adding murder to it seems like the perfect combination, and it almost sounds like Pretty Little Liars but richer. The cover makes me think a group of preppy girls will be involved that have no experience with guilt, and honestly, they make great book characters. Give me blood, betrayal, and a little teen romance, and I'll read it probably in one sitting.