The Jokiest Joking Knock-Knock Joke Book Ever Written...No Joke!

Knock-knock. Who's there? Even more joking shenanigans in The Jokiest Joking Knock-Knock Joke Book Ever Written...No Joke!
This outrageous book features hundreds of hilarious knock-knock jokes for kids, along with hundreds of clever illustrations.
Knock-knock.
Who's there?
Lettuce.
Lettuce who?
Lettuce in and we'll tell you another knock-knock joke!
Knock-Knock.
Who's there?
Venice
Venice who?
Venice dinner?
Knock-Knock.
Who's there?
Police.
Police who?
Police open the door!
Knock-Knock.
Who's there?
Luke.
Luke who?
Luke before you leap.