If a coin comes down heads, that means that the possibility of its coming down tails has collapsed. Until that moment the two possibilities were equal. But on another world, it does come down tails. And when that happens, the two worlds split apart.

I am a strong believer in the tyranny, the dictatorship, the absolute authority of the writer.

When he'd sworn at her and been sworn at in return, they became great friends.

I write almost always in the third person, and I don't think the narrator is male or female anyway. They're both, and young and old, and wise and silly, and sceptical and credulous, and innocent and experienced, all at once. Narrators are not even human - they're sprites.

The justice of it seems to children correct and right - I mean, we laugh at it! We underestimate children's ability to know what is a story and what isn't.

I'm just trying to wake up - I'm so afraid of sleeping all my life and then dying - I want to wake up first. I wouldn't care if it was just for an hour, as long as I was properly alive and awake.

My mother married again after my father's death - another Royal Air Force officer, and a very different kind of man. We went to Australia when I was eight or nine. We lived there for a couple of years, and then came back and lived in North Wales for the whole of my teenage years... I learned how to write poems quite a lot. I just had a good time reading and reading and reading. So that's where I did most of my growing up.