As the creator of the Harry Potter books sees it, her kindness to fans might come back to haunt her. In papers filed for a lawsuit in Manhattan, JK Rowling says she feels betrayed by a fan, Steven Vander Ark, for his role in trying to publish an unauthorised reference work, Harry Potter Lexicon.

Ark is editor of a website containing a fan-created collection of essays and encyclopedic material on the Potter universe, including lists of spells and potions found in the books, a catalogue of magical creatures and a who's who in the wizarding world.
Rowling said she was especially irked that the site's owner and the lexicon's would-be publisher, RDR Books, continued to insist that her acceptance of free, fan-based Web sites justified the efforts.
"I am deeply troubled by the portrayal of my efforts to protect and preserve the copyrights I have been granted in the Harry Potter books," she wrote in court papers filed Wednesday in a lawsuit she brought against the small Muskegon, Michigan, publisher.
She said she intends to publish her own definitive Harry Potter encyclopedia.
"If RDR's position is accepted, it will undoubtedly have a significant, negative impact on the freedoms enjoyed by genuine fans on the Internet," she said.
{{/usCountry}}"If RDR's position is accepted, it will undoubtedly have a significant, negative impact on the freedoms enjoyed by genuine fans on the Internet," she said.
{{/usCountry}}"Authors everywhere will be forced to protect their creations much more rigorously, which could mean denying well-meaning fans permission to pursue legitimate creative activities.