Attack of the Shark-Headed Zombie — Bill Doyle

After Keats and Henry lose their bikes, they need money -- fast. So the help-wanted ad at the supermarket seems ideal for them. All they have to do is weed Hallway House's garden, find some lightbulbs in the attic, sweep the garage . . . and battle a shark-headed zombie. But no one told them about the giant bookworms in the library, the toe-biting carpet in the halls, and the kitchen sinkhole!