This week, David Mitchell (author of Cloud Atlas and the forthcoming The Bone Clocks) is releasing a new short story over 280 tweets (which you can read here). Form follows content, he explains, since his narrator is a teenager high on his mother’s Valium. Mitchell joins good company: Teju Cole, Junot Diaz, and other notables have tried their hand with this strange new form. Pair with: a stroll down memory lane with some beloved authors’ very first tweets and their best.