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 in translation respectively that are authorised by J. K. Rowling. In Iran, several unauthorised translations of the Harry Potter books exist side by side. According to one source, there may be as many as 16 Persian translations in existence concurrently. Iran is not a member of the Universal Copyright Convention, so publishers are not prosecuted for publishing foreign books without respecting copyright or paying royalties. A team consisting of seven Esperantist volunteers completed the translation of "Harry Potter and the Philosopher's Stone" into Esperanto (under the title "Hari Poter kaj la ŝtono de la saĝuloj") in 2004. Rowling's representatives did not respond