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 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 as influences. This article is divided into three sections. The first section lists those authors and books which Rowling has suggested as possible influences on "Harry Potter". The second section deals with those books which Rowling has cited as favourites without mentioning possible influences. The third section