What is this prep school preparing them for?

Camden Fisher arrives at boarding school haunted by a falling-out with her best friend back home. But the manicured grounds of Lethe Academy are like nothing Cam has ever known. There are gorgeous, preppy boys wielding tennis rackets, and circles of girls with secrets to spare. Only . . . something is not quite right. One of Cam's new friends mysteriously disappears, but the teachers don't seem too concerned. Cam wakes up to strangers in her room, who then melt into the night. She is suddenly plagued by odd memories, and senses there might be something dark and terrible brewing. But what? The answer will leave Cam--and readers--stunned and breathless, in this thrilling debut novel.