I don't like to analyze how much of myself goes into my books. The fact that little parts of myself might find their way into these stories - it's mortifying, to be honest. But I definitely have that Catholic feeling of guilt. I feel guilty about my success. In the early days I used to think, "You're going to pay for this; something terrible will happen next". Nothing has yet. But if it does, I'll think, "Well there you go. You deserved it".