The Great Ghost Rescue — Eva Ibbotson

What's a ghost to do?

Humphrey is a small ghost with a big problem. His family have lost their home, and they're off to find a new haunting ground. But soon Humphrey and his parents discover that ghosts all over the country are being turned out as dank castles are converted into cheerful tourist hotels. Humphrey knows something must be done to help the homeless ghosts. And with the help of a sympathetic schoolboy named Rick, maybe he can do something to aid all the ghosts of England after all. . . .