The fourth book in a humorous, easy-to-read series about a boy and his pet fly! Each book in the series has a fun foil cover! Buzz is visiting Grandma, and Fly Guy comes along for the ride. Oops! Grandma swallows Fly Guy, then a spider, then a bird, then a cat, then a dog. . . . She's about to swallow a horse, when Fly Guy shouts: "BUZZZ!" Buzz is starting to worry, but there is nothing Fly Guy can't handle! He flies out, and all the critters follow. And everybody parties!