The Harry Potter Lexicon "the will or the heart" to now publish her own encyclopedia. On 8 September 2008, Rowling won her copyright case against RDR Books. Lexicon publisher RDR Books said: Judge Patterson said that reference materials were generally useful to the public but that in this case, Vander Ark went too far. He said that "while the Lexicon, in its current state, is not a fair use of the Harry Potter works, reference works that share the Lexicon's purpose of aiding readers of literature generally should be encouraged rather than stifled." He said he ruled in Ms. Rowling's favor because the "Lexicon
Legal disputes over the Harry Potter series are unauthorized because the publisher failed to honour its contractual obligations to her. In 2005, Warner Bros. offered CAD$5,000 (later CAD$50,000) to the Canadian folk band the Wyrd Sisters for the rights to use their name in the film version of "Harry Potter and the Goblet of Fire". Rowling had written a scene in the novel in which a band called the Weird Sisters appeared at a school dance, and the group owned the rights to the name in Canada. However, the offer was declined, and instead the band undertook a legal action against Warner Bros., as well as Jarvis