The last thing she wanted was to see her friend getting ideas in her head. There was such a lot of room in there for them to bounce around and do damage.

New things, new ideas arrived and strutted their stuff and were vilified by some and then lo! that which had been a monster was suddenly totally important to the world.

I read anything that’s going to be interesting. But you don’t know what it is until you’ve read it. Somewhere in a book on the history of false teeth there’ll be the making of a novel.

The world rides through space on the back of a turtle. This is one of the great ancient world myths, found wherever men and turtles were gathered together; the four elephants were an Indo-European sophistication. The idea has been lying in the lumber rooms of legend for centuries. All I had to do was grab it and run away before the alarms went off.

There are no maps. You can't map a sense of humour. Anyway, what is a fantasy map but a space beyond which There Be Dragons? On the Discworld we know There Be Dragons Everywhere. They might not all have scales and forked tongues, but they Be Here all right, grinning and jostling and trying to sell you souvenirs.

In all seriousness, people think that it's the ideas that are important. Well, everyone has ideas, all the time. I tend to write mine down and remember them, but at some point you have to apply the bum to the seat and knock out about sixty five thousand words - that's how long a novel is.

It cannot be said often enough that science fiction as a genre is incredibly educational - and I'm speaking the written science fiction, not 'Star Trek.' Science fiction writers tend to fill their books if they're clever with little bits of interesting stuff and real stuff.