Rowling was one of the first authors to invest time and energy communicating directly with her fans online. The biggest of the early fan websites was called MuggleNet, set up by a 12-year-old homeschool kid in Indiana who could have had no idea how much this site was going to change his life. But she also told me that, on at least one occasion, she went into one of these forums anonymously. So I chose a random name that was not a Potter-related name. And I got rounded on by users who told me in no uncertain terms, just to get out. For Millie in that room, I'm clearly an idiot who doesn't know anything. But