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
The Magical Worlds of Harry Potter in March 2001 and hired a company to take care of accounting, marketing, promotion, and selling. Colbert has never met Rowling and the book has not been approved by her or Warner Brothers (the owner of the film rights to the "Harry Potter" novels). He was given permission to publish it as long as he noted on the cover that it had not been approved by Rowling. The book has been met with positive reactions from critics. Margie Thomson of "The New Zealand Herald" commented that "it's interesting, although light, and should keep smart-alecky kids and the truly curious happy