Thank the fictional gods! JK Rowling has won her case against Steve Vander Ark of Harry Potter Lexicon, and RDR Books, who intended to publish a printed version of her material arranged into a reference book.
Vander Ark and RDR Books claimed Fair Use, but presiding judge Robert Patterson ruled that since the reference book contained no original commentary and simply rearranged copious amounts of Rowling’s material, its publication would constitute an infringement of Rowling’s copyright.
Rowling has stated that she, herself, intended to produce a Harry Potter Universe reference work for charity purposes, and Vander Ark’s book would also have infringed on her right to create such a derivative work.