David: (On what Esther, his wife, has taught him) The thing I've got from Esther most of all is self-discipline. I always have to go out to work even if it's just a desk somewhere or an office or the British Library. So I've always found it amazing the way, as a novelist, she goes to work at home. She has a timetable she sticks to every day. You literally see someone working through a different problem in the story, and finding different ways to get in. She's taught me to take your work seriously even if you're at home.