(From the publisher):
There's been an accident!
She doesn't know who she is, and doesn't know why she's invisibly floating through the buildings and grounds of a half-remembered boarding school. Then, to her horror, she encounters the ancient evil that four peculiar sisters have unwittingly woken -- and learns she is their only hope against a deadly danger.
Original title: The Time of the Ghost
Genre: Fiction→ Children & Young Adult→ Fantasy
Fiction→ Children & Young Adult→ Horror→ Ghosts