Update: Stefan Jones sez, "Bizarro toy, glassware, and gadget house American Science & Surplus offers a limited range of animal skulls, plus replica human skeletons, at very good prices. I had one of their coyote skulls in my cubicle for a while."
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.