This has nothing to do with books...

There are two of me right now. One of them has a beautiful little golden halo and dresses in long white robes, with big downy white wings. Very traditional angel. Sitting on my right shoulder. The other one wears black and red, has pointy little horns on its head, a long red devil-tail, and carries the ever-so-traditional pitchfork. Sitting on my left shoulder...