Knock Knock Boo Who?

The perfect joke book for Halloween or any other day of the year. The only thing that's scary is how hard it will be to stop laughing.   Knock Knock. Who's there? Howl. Howl Who? Howl I know you're not a monster?   Brenda Ponnay is back with a collection of slightly spooky illustrated knock knock jokes that are sure to be read and repeated over and over again. Perfect for giving family and friends the chills—and giggles galore.