Famed Harry Potter author J.K. Rowling's long battle with a fan who planned to publish an unauthorized guide to her famous franchise will continue, after he filed a court appeal.Rowling and executives at Warner Bros, the makers of the films and owner of intellectual property rights to the books, won legal proceedings against writer Steve Vander Ark and publisher RDR Books earlier this year. The writer has so far managed to stall the publication of the 400-page text after learning of their plans to release The Harry Potter Lexicon, detailed in a suit filed last year. RDR’s legal team was expected to file a notice of appeal in September, but has dragged on the legal battle with the notice filed on November 7th, to the United States Court of Appeals, reports Publisher’s Weekly. The writers have offered to revise the book and remove any offending or copyrighted passages, which Rowling has reportedly declined to agree to.

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