Legal disputes over the Harry Potter series October 2007, Warner Bros. and Rowling sued Michigan-based publishing firm RDR Books to block the publication of a 400-page book version of the Harry Potter Lexicon, an online reference guide to her work. Rowling, who previously had a good relationship with Lexicon owner Steve Vander Ark, reiterated on her website that she plans to write a "Harry Potter" encyclopedia, and that the publication of a similar book before her own would hurt the proceeds of the official encyclopedia, which she plans to give to charity. A judge later barred publication of the book in any form until the case was
Harry Potter influences and analogues to have at least as good a case for claiming plagiarism as the American author currently suing J. K. Rowling [i.e. Nancy Stouffer], but unlike her, Ibbotson says she would 'like to shake her by the hand. I think we all borrow from each other as writers.'" Harry Potter influences and analogues Writer J. K. Rowling cites several writers as influences in her creation of her bestselling "Harry Potter" series. Writers, journalists and critics have noted that the books also have a number of analogues; a wide range of literature, both classical and modern, which Rowling has not openly cited