Define "not"

Hey Harry Potter fan(atics), guess what? J.K. Rowling's NOT working on a prequel to the series. Big news, right? Well...except she posted an 800 word excerpt of this prequel on the Waterstone's website. It involves James Potter, Sirius Black, and that famous flying motorcycle, JIC you can't read it (her handwriting is a bit diff). Just wait for the Flash to load, go to "Read our author's stories" on the bottom right of the page, click on J.K. Rowling's name, and read both sides of the "paper". And there, at the bottom, the venerable lady writes "From the sequel I'm not working on--but that was fun!"

What a booktease.