Harry Potter a cause-and-effect relationship, there is a clear correlation, and it seems that Harry Potter's cultural impact may be stronger than just a fandom bond. Many fan fiction and fan art works about "Harry Potter" have been made. In March 2007, "Harry Potter" was the most commonly searched fan fiction subject on the internet. At the University of Michigan in 2009, StarKid Productions performed an original musical parodying the "Harry Potter" series called "A Very Potter Musical". The musical was awarded "Entertainment Weekly"'s 10 Best Viral Videos of 2009. The sport Quidditch, played by characters in the "Harry Potter" series, was
Legal disputes over the Harry Potter series An Unauthorized Guide to Harry Potter Fiction". In November 2007, "The Scotsman" reported that Rowling had threatened legal action against American computer programmer G. Norman Lippert for allegedly violating her intellectual property rights by producing and publishing the online novel, "James Potter and the Hall of Elders' Crossing", an unofficial and unauthorised continuation of the "Harry Potter" series. Written as a fan fiction project for Lippert's wife and sons, the novel is set eighteen years after the end of the last official installment in the series, "Harry Potter and the Deathly Hallows", and describes the adventures of Harry Potter's son,