I really just wanted to write about three brothers. When you do that, though, it gives you this wonderful opportunity to tie together different social milieus, because siblings usually move into different worlds as they grow up.

One of the points where the art world is at its most metaphysical is in this weird aspect of the power of the expert. There are experts who claim they cannot be fooled because they have an inner connection to an artist and can feel whether something is genuine or fake. I've heard experts say, on panels: When it comes to my period, or my painters, I cannot be fooled. And of course that's completely ridiculous.

I'm trying to exploit the bestseller, in a way, but not in the sense of repeating the formula. It's just that the bestseller did so well economically that now I'm freer to do what I want to do, or to try out what I want to try out.

I wanted to write a book that would leave open many riddles and mysteries, even to me. Of course in some cases I do know the answers, but in many others I don't know and don't want to know.

We think in terms of fate even if we don't believe in it. Even something as trivial as missing the bus - we think: Well, it might be good for something. We always have that thought, no matter how critical we try to be. The idea that everything is always total chance - we're not made for that.

Usually I work out the plot before I start. This time I thought: Writers always talk about not knowing where a book is going - -I want to experience that, too. What I found out is that it's very interesting, but it takes much longer because you have so many false starts. You take wrong turns and you have to go back and start the whole chapter, or the whole section, from scratch.

You say fate is almost indispensable to literature - I think it's completely indispensable, at least in a novel, because a novel always has a plot. Even if nothing happens, even if someone just spends a day walking around Dublin, or whatever, there's still something going on.