"The only time I've ever learned anything from a review was when John Lanchester wrote a piece in the Guardian about my second novel, The Heather Blazing. He said that, together with the previous novel, it represented a diptych about the aftermath of Irish independence. I simply hadn't known that – and I loved the grandeur of the word "diptych". I went around quite snooty for a few days, thinking: "I wrote a diptych.""