Imagination, it turns out, is a great deal like reporting in your own head. Here is a paradox of fiction-writing. You are crafting something from nothing, which means, in one sense, that none of it is true. Yet in the writing, and perhaps in the reading, some of a character's actions or lines are truer than others.

And as journalists we look for differences - differences between countries, cultures, classes, and communities. We're very sensitized to difference, but it's much harder to write about similarities across countries, cultures, classes, and communities.

As a reporter you tend to seek coherence from your subject or your source - it all needs to add up and make sense. In truth, in reality, there's often a great deal of murkiness and muddiness, confusion and contradiction.

Fiction just has a lot more room for ambivalence and internal conflict, contradiction, and for me that sums up so much of what people felt after 9/11 - confusion even. And I think that's hard to capture in journalism.

Over the centuries, and even today, the Bible and Christian theology have helped justify the Crusades, slavery, violence against gays, and the murder of doctors who perform abortions. The words themselves are latent, inert, harmless - until they aren't.

So the premise of 'The Submission' is that there's an anonymous competition to design a 9/11 memorial and it's won by an American Muslim, an architect born and raised in Virginia, and his name is Mohammad Khan.

Work less than you think you should. It took me a while to realise there was a point each day when my creativity ran out and I was just producing words - usually lousy ones - for their own sake. And nap: it helps to refresh the brain, at least mine.