It is a work of psychogeography, albeit in a less explicit sense than Iain Sinclair's or Will Self's. It had to be fiction though, because I needed that freedom of including whatever belonged, and cutting out whatever didn't. The main fiction in it was matching Julius' generous and self-concealing character to New York's generous and self-concealing character. I think this also adds to my answer about New York's personality in the book.

The banality of evil transmutes into the banality of sentimentality. The world is nothing but a problem to be solved by enthusiasm.

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.

What's interesting about Twitter is the unmediatedness of it, the directness of it. I'm on a train somewhere in New York and I send out a tweet. Somebody sitting at dinner in Bombay checks their phone and they see it.

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.

I'm grateful for the likes of Kundera, Murnane, Markson, Berger, and, in his recent work, Coetzee. But no matter how celebrated they are, critics still consider them askance. Elizabeth Costello, for example, is a great novel, but it got quite a critical panning when it was published. The complaint was that it was simply a book of speeches, without the machinery of conventional fiction. Markson's books are compilations of facts and alleged facts, very artfully.

If you see a theme that you might want to take a photo of, you sort of stand there for an hour waiting for it to resolve, waiting for the geometry of a theme to be exactly what you want them to be. That was my process to get photos.