Not all coincidence has to be loaded with meaning. Sometimes, things simply recur because that's how it is in life, that's how the mood gets in. It's good to subtly overdo it too, as Nabokov does, as Sebald does. It's a good way to intensify that region of localized weather that we call a novel.

But a book suggests conversation: one person is speaking to another, and audible sound is, or should be, natural to that exchange. So I read aloud with myself as the audience, and gave voice to another's words.

Being Nigerian is a strong part of my identity. Being American is a strong part of my identity. And there are important parts of who I am that really have nothing to do with my national connection.

Our biggest art forms are film and television, and there hasn't been a great film about 9/11 yet, nor has there been a great television series. Something like The Wire gives us a rich and fully achieved picture of the wasteful, cruel War on Drugs; something like The White Ribbon gives a perspective on World War I that could only have been presented long after the event itself.

It's an Obama book, certainly. I was delighted, and astonished, to hear recently that he was reading it. It's a book about a new kind of American reality, one that takes diversity for granted. It doesn't celebrate diversity, actually, it just says: this is how we live now.

I adore imaginary monsters, but I am terrified of real ones.

I'm not trying to be in your face and take a picture that is like a journalistic kind of image. I got interested in a kind of complicated, compiled, visual field.