Jealousy clings to love's underside like bats to a bridge.

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.

In Germany, you have a huge official memorial to the murdered Jews and then you have this artist who's been putting these stumbling blocks, these brass cobblestones, outside the houses Jews were taken away from. It's somewhat controversial and has met some resistance.

I had been a reporter for 15 years when I set out to write my first novel. I knew how to research an article or profile a subject - skills that I assumed would be useless when it came to fiction. It was from my imagination that the characters in my story would emerge.

I found 'The Twin' sitting on a coffee table at a writers' colony in 2009. It carried praise from J.M. Coetzee. That seemed ample justification for using it to avoid my own writing. I finished it - weeping - a day later, and I've been puzzling over its powerful hold on me ever since.

I read Claire Messud's 'The Emperor's Children,' I read Joseph O'Neill's 'Netherland' - but to me, they're not 9/11 novels. In 'The Emperor's Children,' 9/11 felt to me like a piece of the plot; the novel wasn't wrestling with what 9/11 meant. And 'Netherland' felt the same way. I liked both books a lot but I don't see them as 9/11 novels.

As a novelist, you deepen your characters as you go, adding layers. As a reporter, you try to peel layers away: observing subjects enough to get beneath the surface, re-questioning a source to find the facts. But these processes aren't so different.