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
The Harry Potter Lexicon appropriates too much of Rowling's creative work for its purposes as a reference guide." In December, 2008, a modified (and shorter) version of Vander Ark's Lexicon was approved for publication and was released January 16, 2009 as "The Lexicon: An Unauthorized Guide to Harry Potter Fiction". The Harry Potter Lexicon The Harry Potter Lexicon is a fan-created online encyclopedia of the "Harry Potter" series. The site was created by school librarian Steve Vander Ark. It contains detailed information for all seven published "Harry Potter" books. The Lexicon lists characters, places, creatures, spells, potions and magical devices, as well as analyzing