The hilarious crayons from the #1 New York Times bestselling The Day The Crayons Quit are ready to celebrate Halloween! The Crayons want to go trick-or-treating, but they're not sure what to say! In this humorous, small hardcover Halloween story, Purple Crayon teaches the rest of the crayon box the magic words to say when they ring their neighbors' doorbells. (Hint: It's NOT "Boo!")