Bruno: We're not supposed to be friends, you and me. We're meant to be enemies. Did you know that?

The first thing he noticed was how quiet it was. This was nothing like the kind of quiet he heard when he woke up in the middle of the night after a bad dream. When that happened, there were always strange, unidentifiable sounds seeping into his room from the tiny gaps where the windowpanes weren't sealed together correctly. At those moments he could always tell there was life outside, even if all that life was fast asleep. It was a silence that wasn't silence at all.

With the adult ones, I feel I need to get as deep inside the psychology of a character as I can, and that needs to be first-person. In the children's books, I feel I need some distance. I don't want to be the nine-year-old at the center of the story. I need to have some type of narrative voice.

He suddenly became convinced that if he didn’t do something sensible, something to put his mind to some use, then before he knew it he would be wondering round the streets having fights with himself and inviting domestic animals to social occasions too.

Unless you're very boring, I think most people who've lived long enough have something in their past which will never go away. As a writer, my interest has become in writing about much more emotional, personal topics. I'm trying to reach into subjects I have never written about before.

Sitting around miserable all day won't make you any happier.

I like the idea of standalone novels. I always found with series of books, it's something that publishers love obviously because they can make a lot of money and they build an audience from book to book, but I don't like that as a writer. I prefer the idea of just telling a story, completing it within your book, and moving on and not forcing a child to read eight of them.