The knock-knock joke: a kid classic. So many funny, punny punchlines. It was just screaming for its own book. To do this classic joke justice, we decided to gather fourteen of the best-known and most talented children?s book artists to illustrate their favorite punchlines. The results are wacky, zany, and absolutely hilarious. If you knock on Tomie dePaola?s door, beware! Is that a girl or a gorilla? Who?s knocking at Saxton Freymann?s door? Just a couple of talking lettuces. Talking lettuces?! One impatient cow can hardly wait to get through Laurie Keller?s door, and David Small has a surprise waiting for his intruding vampire. In this collection, you?ll recognize some of your favorite jokes and be surprised by new ones. But one thing is certain: Each time there?s a knock, you?ll want to answer the door!