The Spell of the Sorcerer's Skull — John Bellairs

Professor Childermass has disappeared. And Johnny Dixon can find few clues: a haunted dollhouse and a lighted. menacing iack-e-lantern. The dollhouse is a miniature replica of a room in the Childermass family home -- the same room where the professor's granduncle Lucius died in a rely bizarre way. When Johnny takes a tiny skull from the dollhouse demonic forces are unleashed -- forces that capture the professor and lead Johnny and his friends Fergie and Father on a islands of Maine. There waiting for them is something far more terrifying than they could have imagined.