Update: Khurram sez, "they're based on a form of writing called 'ambigrams', which appear to say one thing forward, and another thing when read in a mirror."
Update: David sends us this clever Love/Hate optical illusion tee
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.