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 to translate the Harry Potter books into German more rapidly. The German publisher of the Harry Potter books, Carlsen Verlag, filed a cease and desist against the fan translators; they complied, taking down the translations. In some countries, when there were no authorised translations into the local language, translations not sanctioned by J. K. Rowling were prepared and published. Such was the case, for example, in Sri Lanka, where the books have been unofficially translated into Sinhala and possibly into Tamil. However, there have been more recent translations into both Sinhala and Tamil published by Sarasavi Bookshop and Manjul Press