"In our brief, we explain both why the Lexicon is the sort of important and transformative work that fair use has long protected, and why Ms. Rowling is not entitled to the injunction she seeks.
Read our full brief here.
And if you want to know what Rowling says, here is her brief, too, filed last month.
UPDATE: Ms. Rowling's d reply brief was filed on February 27. The briefing on her preliminary injunction motion is now complete, and the hearing on this motion is scheduled for March 13 in New York."