Writing is acting in the sense that you're imagining and inhabiting another. In the book I was trying to get at the root of what true acting is.

When I left university I was sure that I was going to be a painter. Then I had a crisis, a revelation. I saw Dolce Vita and my mind was blown by it, by the synthesis. I realised I wanted to be a filmmaker and started making films. I was writing screenplays and couldn't get money because my work was so uncommercial. I got married and started writing fiction. What was wonderful is that it gave me my freedom because no-one can tell me I can't work. Novels have become equally important to me as films. I consider myself a storyteller and passionately engaged in both of those disciplines.

Deirdre Maddon has an extraordinary, almost celestial way of telling a story. There are so many great writers now - although I also want to go back and read all of Dickens again.

I'm fascinated by what makes up a self, how one becomes a self, how much is it an answer to others and how much is it an essence of self.

Writing is still a bit of a miracle - the whole process: I see the world, filter the world, write down abstract squiggles on a page which somebody is then able to connect with. I'm still amazed by it and think I always will be.

I think it's very important to keep being frightened - if you're not frightening yourself, you should take a break. You need to keep experimenting. You also need to take time - that's how you do good stuff - layering and depth of knowledge.

As much as there are intellectual choices to be made and all the rest of it, a great actor has the ability really, to disappear and lose themself in a kind of mystical fashion. My appreciation and fascination with true acting is really all over the book, definitely.