Warner Bros. Entertainment Inc. v. RDR Books York trial attorney, David Hammer. Ms. Hasse then asked a group of intellectual property lawyers at Stanford Law School to help defend RDR Books' right to publish. Fair Use Project Executive Director Anthony Falzone said the Lexicon is protected by U.S. law which has long given people "the right to create reference guides that discuss literary works, comment on them and make them more accessible." On 16 January 2008, Rowling and Warner Bros. filed their full 1,100 page complaint against RDR Books, claiming that the book compiles and repackages Ms. Rowling's fictional facts derived wholesale from the Harry Potter works
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