"One day, everything was exactly as it was supposed to be. And the next, the closest thing Abby ever had to a sister, Noreen, was just... gone. Distracted by the annual preparations for the Samhain festival, Abby's classmates are quick to put Noreen's disappearance aside. The Coven will find her, Abby's friends say. They have it under control. But Abby can't let it go. Soon a search for answers leads her down a rabbit hole that uncovers more secrets than Abby can handle. As mounting evidence steers her toward the off-limits woods that surround the academy, she begins to see that Noreen's disappearance mysteriously has a lot in common with another girl who went missing all those years ago." -- Amazon.com