Incoming Resources
- The best ever knock-knock jokes for kids, Bob Phillips
- Knock-knock jokes, by Michael Dahl & Donald Lemke
- DC super heroes, world's greatest jokes, by Michael Dahl & Donald Lemke
- Spider-Man presents the Marvel joke book
- Knock knock jokes, by Ima Laffin
- Olive you!, and other Valentine knock-knock jokes you'll a-door, by Katy Hall & Lisa Eisenberg ; pictures by Stephen Carpenter
- Open up and laugh!, a book of knock-knock jokes, Michael Dahl ; illustrated by Brian Jensen ; reading advisers, Adria F. Klein, Susan Kesselring
- Laugh-out-loud holiday jokes for kids, 2-in-1 collection of spooky jokes and Christmas jokes, Rob Elliott
- Doctor Knock-Knock's official knock-knock dictionary, by Joseph Rosenbloom ; illustrated by Joyce Behr