Author(s): R. L. Stine
Zoey and Billy Traister find a large suitcase in a trash pile. Inside: a grinning ventriloquist dummy. They bring it home and read the secret words and bring Slappy to life, who treats them to an evening of true horror; trashes their house; insults them; hurts them; orders them to become his servants. Then they discover Slappys diary.