The Library didn't only contain magical books, the ones which are chained to their shelves and are very dangerous. It also contained perfectly ordinary books, printed on commonplace paper in mundane ink. It would be a mistake to think that they weren't also dangerous, just because reading them didn't make fireworks go off in the sky. Reading them sometimes did the more dangeous trick of making fireworks go off in the privacy of the reader's brain.
Terry PratchettI hate cats." Death's face became a little stiffer, if that were possible. The blue glow in his eye sockets flickered red for an instant. "I SEE," he said. The tone suggested that death was too good for cat haters.
Terry PratchettMr Lipwig, there's a lady in the hall to see you and we've thanked her for not smoking three times and she's still doing it!
Terry PratchettIf you were going to be successful in the world of crime, you needed a reputation for honesty.
Terry Pratchett