In the event that she gets tired of merely telling us new things about her old Harry Potter books, J. K. Rowling hasn’t entirely ruled out the possibility of actually writing a new one. From Time (“Person of the Year 2007: Runners-Up: J. K. Rowling,” by Nancy Gibbs):
“There have been times since finishing, weak moments,” she says, “when I’ve said, ‘Yeah, all right,’ to the eighth novel.” But she’s convinced she’s doing the right thing to take some time away, do something else. She’s working on two projects now, an adult novel and a “political fairy tale.” “If, and it’s a big if, I ever write an eighth book about the [wizarding ] world, I doubt that Harry would be the central character,” she says. “I feel like I’ve already told his story. But these are big ifs. Let’s give it 10 years and see how we feel then.”
There’s a lot more, including talk about her “religious agenda”–but even though she’s taken some shots from fervent fundamentalists, she’s no Philip Pullman.