<P> Diary of a Wimpy Kid is a series of fiction books written by the American author and cartoonist Jeff Kinney . All the main books are the journals of the main character, Greg Heffley . Befitting a teen's diary, the books are filled with hand - written notes and simple drawings of Greg's daily adventures . </P> <P> Since the release of the online version in May 2004, most of the books have garnered positive reviews and commercial success . As of February 2008, it has been purchased one million times . </P> <P> The first, second, fourth, and ninth installments have been adapted into films by 20th Century Fox . </P> <P> The website Poptropica released islands in the theme of Diary of a Wimpy Kid called Wimpy Wonderland and Wimpy Boardwalk, both of which credit Kinney in an ambiguous contributor's role . </P>

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