The Halloween Hex (High Tech Howard, No. 2), Jack Rabbit Books (High Tech Howard Series)

Tim Watkins and his android friend Howard can't wait for Halloween. There will be a big party at school, and Tim's parents are hosting a seance with a famous medium that night. Tim and Howie are also planning a trip to the scariest haunted house in town. - The only thing that's bothering them is Oscar Novotny, the seventh-grade bully who keeps threatening to beat them up. To get revenge, Tim and Howard put a phony hex on Oscar to spook him. It works, but Oscar fights back with a scheme so frightening that Howie and Tim wish Halloween has never come?