Something Upstairs (also published as Something Upstairs: A Tale of Ghosts) is a young adult historical thriller fiction novel written by Avi first published in 1988. It concerns a 12-year-old boy named Kenny Huldorf who has moved to a new area and discovers a ghost, Caleb, in his room. Caleb was the slave of a previous owner of the home, and is stuck there until someone can help set him free.