Dan Sinker—maybe you’ve heard of him?—is taking over the @HuffPostBooks Twitter feed today with the promise of a short story written in real time. Sinker’s promoting his new book The F***ing Epic Twitter Quest of @MayorEmanuel, a compilation of his tweets (with commentary!) that Julia Thiel reviewed in last week’s issue of the Reader. The story doesn’t appear to have started yet, but HuffPo tweeted a few hours ago that the affair will be “much darker” than @MayorEmanuel.