I think when people mean that Discworld books have become darker they really mean the series is growing up. In 'The Colour of Magic' most of the city is set alight. It's a joke, in much the same way that the Earth is destroyed almost at the start of Douglas Adams's 'The Hitchhikers Guide to the Galaxy.'

It was also a room full of books and made of books. There was no actual furniture; this is to say, the desk and chairs were shaped out of books. It looked as though many of them were frequently referred to, because they lay open with other books used as bookmarks.

I like the idea of democracy. You have to have someone everyone distrusts.

Belief was never mentioned at home, but right actions were taught by daily example.

It's tough at the top. It's tough at the bottom. But in between you could use them for horse-shoes.

You know, you're rather amusingly wrong.

Rincewind tried to force the memory out of his mind, but it was rather enjoying itself there, terrorizing the other occupants and kicking over the furniture.