Knock knock-who's there? A book filled with hilarious one-liners and surprises! This book will introduce readers to knock-knock jokes on a wide variety of high-interest subjects, from space to dinosaurs. Fact boxes on each spread will spark readers' interest, as the accompanying jokes make them laugh out loud. Colorful images and a bright design will catch readers' eyes, as they play with language and the element of surprise. Readers are sure to find a laugh behind every door-and on every page

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