And when you look at the sky you know you are looking at stars which are hundreds and thousands of light-years away from you. And some of the stars don’t even exist anymore because their light has taken so long to get to us that they are already dead, or they have exploded and collapsed into red dwarfs. And that makes you seem very small, and if you have difficult things in you life it is nice to think that they are what is called negligible, which means they are so small you don’t have to take them into account when you are calculating something.

At 20, 25, 30, we begin to realise that the possibilities of escape are getting fewer. We have jobs, children, partners, debts. This is the part of us to which literary fiction speaks.

Eventually scientists will discover something that explains ghosts, just like they discovered electricity, which explained lightning, and it might be something about people's brains, or something about the earth's magnetic field, or it might be some new force altogether. And then ghosts won't be mysteries. They will be like electricity and rainbows and nonstick frying pans.

When I was 13 or 14, I started devouring novels; literature took quite a while to take me over, but it caught up just in time to save me from becoming a mathematician.

I have very fond memories of swimming in Walden Pond when we lived in Boston. You'd swim past a log and see all these turtles sunning themselves. Slightly disturbing if you thought about how many more were swimming around your toes, but also rather wonderful.

And I know I can do this because I went to London on my own, and because I solved the mystery…and I was brave and I wrote a book and that means I can do anything.

I want my name to mean me.