The Colour of Magic  - Terry Pratchett

"It´s a device for making pictures quickly," said Twoflower. "Quite a new invention. I´m rather proud of it but, look, I don´t think these gentleman would - well, I mean they might be - sort of apprehensive? Could you explain it to them? I´ll reimburse them for their time, of course."

"He´s got a box with a demon in it that draws pictures," said Rincewind shortly. "Do what the madman says and he will give you gold."

The Watch smiled nervously.

 

It´s such a shame that I have to go to work in about half an hour. I would much rather snuggle up with this book in my reading chair.