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David Murray "Dav" Pilkey Jr. (born March 4, 1966) is an American cartoonist, author, and illustrator of children's literature. He is best known as the author and illustrator of the children's book series, Captain Underpants, and its spin-off children's graphic novel series Dog Man, the latter published under the respective writer and illustrator pen names of George Beard and Harold Hutchins, which are also the names of the two protagonists of the Captain Underpants series. Description above from the Wikipedia article Dav Pilkey, licensed under CC-BY-SA, full list of contributors on Wikipedia.