This little comic, written by me and drawn by Christopher in 2007, explains the origin of some of the Disneyland Haunted Mansion's most engaging ghosts: the ballroom organist and the screaming singers who fly out of his organ pipes.
This has never seen the light of day before -- it's the closest I've come as an adult to writing fanfic, and it was incredibly satisfying to produce. Christopher's Al Jaffee-style detailed illustrations really make it, too.
I write books. My latest is a YA science fiction novel called Homeland (it's the sequel to Little Brother). More books: Rapture of the Nerds (a novel, with Charlie Stross); With a Little Help (short stories); and The Great Big Beautiful Tomorrow (novella and nonfic). I speak all over the place and I tweet and tumble, too.