The Thurwell Twins and the Haunted School

The first day of school is always exciting but when it happens to be the most haunted school in the whole world and located on a windswept moor miles from anywhere, a place oozing with mysteries both past and present, horrid and sinister, then any newcomer has a right to feel more than a little excited, perhaps more than a little frightened... Penny and Peter Thurwell are excited to start their first year at St. Spiritus, having just transferred as second years from another school. The twins have more than friends and grades to worry about though, once ghosts begin to show up. Can they solve the mysteries of the school?