Judge Patterson in the Southern District of New York issued his opinion today in the Harry Potter Lexicon case, which involved an attempt by the defendants to convert their very popular website into print form and sell it. J.K. Rowling and the studio behind the Harry Potter films sued, and the court held that the Lexicon was not protected by fair use.
I’ve only had time to skim the decision, but my quick take is that a district court in the same circuit that decided the Seinfeld Aptitude Test case (Castle Rock Entertainment v. Carol Publishing Group, 150 F.3d 132 (2d Cir. 1998)) would have had a hard time finding fair use here. If multiple choice questions based on “Seinfeld” infringe on the show, then encyclopedia entries based on Harry Potter probably do, too. That’s not an endorsement, just a syllogism.