'Perfect' is about a set-up that looks perfect from the outside - beautiful country house, beautiful wife and mother, everything where it should be - and the deep fissures that, in fact, lie beneath that. 'Perfect' was partly a response to the shock of my first book, 'The Unlikely Pilgrimage Of Harold Fry,' being a success.

I went through a stage of writing my cramped hand in tiny books. My two sisters and I did have our Bronte period. My mum is from Yorkshire, and we would go up to the Moors. It tapped into our romantic visions of ourselves.