The White Devil by Justin Evans
Set at Harrow, an elite boarding school just outside London, its protagonist is an American teen shipped off there as a last resort by his father to shape up. The teen bears an (un)fortunate resemblance to the poet/bad boy Lord Byron, a famous alum of Harrow. Soon a classmate turns up dead, a ghost begins to appear, a literary mystery begins, an alcoholic headmaster tries to dry out, classmates appear to contract a deadly form of tuberculosis, and teenage homosexuality makes an erotic/horrifying appearance along with the ghost (buggery, I think they call it over there). Almost finished with it, so far it's a fun read and has creeped me out a bit at times late at night.