(From the publisher):
Johnny’s father is gravely ill, and Johnny suspects supernatural causes. Under the guidance of a stranger fortune-teller and Brewster, an otherworldly falcon, he learns that his father’s body has been captured by a ghostly and malevolent spirit – who wants to use it to destroy the world! To stop this demon, Johnny, Fergie, and Professor Childermass must battle it in its own territory… in another world.
Original title: The Wrath of the Grinning Ghost
Genre: Fiction→ Children & Young Adult→ Mystery
Fiction→ Children & Young Adult→ Horror