The missing zucchini

Someone has stolen the Zamboni sisters' giant zucchini, which was certain to win first prize at the Harvest Fair. Max Monroe is on the case, with the help of his peculiar sidekick -- the ghost of his great-uncle Larry. They encounter a cast of unusual suspects. But who would -- or even could -- steal a two-hundred-pound vegetable? One thing is for sure: this isn't your garden-variety mystery!