In the twenty-sixth book of the Critter Club series, Ellie and the girls plan a costume party for pets. Let the cute parade begin! Ellie's favorite holiday is coming up: Halloween! She and friends plan to decorate the Critter Club barn and throw a costume party for neighborhood pets! But they soon realize they're not alone in the barn. A bat friend has somehow gotten trapped inside. Ellie isn't sure how to care for a wild animal. With the help of a special vet, can she return the bat to its home in time for the Halloween bash? With easy-to-read language and illustrations on almost every page, The Critter Club chapter books are perfect for beginning readers.