Harry Potter author goes to court

But the judge will decide whether the use of the material by the small Muskegon, Mich., publisher was legal because it was used for some greater purpose, such as a scholarly pursuit.

In court papers filed prior to the trial, Rowling said she was "deeply troubled" by the book.

"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. "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."

In court papers, Vander Ark, 50, said he was a teacher and school librarian in Byron Center, Mich., before recently moving to London to begin a career as a writer.

He said he joined an adult online discussion group devoted to the books in 1999 before launching his own Web site as a hobby a year later. Since then, neither Rowling nor her publisher had ever complained about anything on it, he said.

In May 2004, he said, Rowling mentioned his Web site on her own, writing, "This is such a great site that I have been known to sneak into an Internet cafe while out writing and check a fact rather than go into a bookshop and buy a copy of Harry Potter (which is embarrassing). A web site for the dangerously obsessive; my natural home."

The Web site attracts about 1.5 million page views per month and contributions from people all over the world, Vander Ark said.

He said he initially declined proposals to convert the Web site into an encyclopedia, in part because he believed until last August that in book form, it would represent a copyright violation.

After Rowling released the final chapter in the Harry Potter series that same month, Vander Ark was contacted by an RDR Books employee, who told him that publication of the lexicon would not violate copyright law, he said.

Still, to protect himself, Vander Ark said he insisted that RDR Books include a clause in his contract that the publisher would defend and pay any damages that might result from claims against him.

He said it was decided that the lexicon would include sections from the Lexicon Web site that give descriptions and commentary on individual names, places, spells and creatures from Harry Potter stories.

In his court statement, Vander Ark still sounds like a fan, saying the lexicon "enhances the pleasure of readers of the Potter novels, and deepens their appreciation of Ms. Rowling's achievement."

But the affection no longer seems a shared experience.

In court Friday, Hammer said Rowling's lawyers did not want Vander Ark in the courtroom while Rowling testifies.