J.K. Rowling is at it again. The author is penning a series of a dozen stories leading up to Christmas, and the first one has been posted on Pottermore. It's about the town that the Dursleys move to to avoid the letters that Harry starts getting from Hogwarts. "Cokeworth has a river running through it," Rowling writes. "Evidence of at least one large factory in the long chimney overlooking Snape's house, and many small streets full of workers' houses." There are some Easter eggs in the text, which details the fact that Snape and Harry's mother, Lily, grew up in the same town. Pottermore's account tweeted the announcement with a riddle, which is below. Take a look and check back as we update with more information about all the stories!