I am frustrated by celebrities who decide to write children's books because they think it's easy. That drives me crazy. It's frustrating because it's unfair to children. Because they'll get a lot of attention, they'll get a lot of marketing budget and so on just because they're a celebrity - the Madonnas, the Ricky Gervaises, the Russell Brands.

The thing about exploring is that you have to know whether the thing you've found is worth finding. Some things are just sitting there, minding their own business, waiting to be discovered. Like America. And other things are probably better off left alone. Like a dead mouse at the back of the cupboard.

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.

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.

The dot that became a speck that became a blob that became a figure that became a boy

The people I see from my window. In the huts, in the distance. They're all dressed the same.' 'Ah, those people,' said Father, nodding his head and smiling slightly. 'Those people...well, they're not people at all, Bruno.' Bruno frowned. 'They're not?' he asked, unsure what Father meant by that.

Do you see the irony at all, Tristan?’ I stare at him and shake my head. He seems determined not to speak again until I do. ‘What irony?’ I ask eventually, the words tumbling out in a hurried heap. ‘That I am to be shot as a coward while you get to live as one.