In this delightful follow-up to the New York Times bestselling Duck & Goose, Duck, Duck, Goose, and Duck & Goose Go to the Beach, the feathered friends are ready for a night of trick-or-treating in the meadow. Duck is going as a spooky ghost. Goose is going as a brave superhero. And Thistle's costume . . . well, that's a secret. But what will Duck & Goose do when they hear a very scary swamp monster is looking for them?