I didn't go to university. Didn't even finish A-levels. But I have sympathy for those who did.

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.'

The singers all loathe the sight of one another, the chorus despises the singers, they both hate the orchestra, and everyone fears the conductor; the staff on one prompt side won't talk to the staff on the opposite prompt side, the dancers are all crazed from hunger in any case.

Anyway, why would you trust anything written down? She certainly didn't trust "Mothers of Borogravia!" and that was from the government. And if you couldn't trust the government, who could you trust? Very nearly everyone, come to think of it.

One of the hardest lessons in young Sam's life had been finding out that the people in charge weren't in charge. It had been finding out that governments were not, on the whole, staffed by people who had a grip, and that plans were what people made instead of thinking.

The thing is, 'Discworld' had been going on for a very long time, and I've written children's books as well. Usually when people have a really big series they franchise it, which I thought is a bit of a no-no, so I thought what I'd do is I'd franchise it to myself.

It's a sword. said the Hogfather. They're not meant to be safe.