Absolutely ace boarding school horror/thriller that rips along with great characters, dialogue, atmosphere and a creeping sense of encroaching danger, with twists and turns and a satisfyingly bloody finale. The chapter titles alone make clear the novel's debt to about a million horror films, and you could easily see this being turned into a smart, slick, suspenseful slasher flick, but even if it isn't, it's all that, in a book.