Cambridge is heaven, I am convinced it is the nicest place in the world to live. As you walk round, most people look incredibly bright, as if they are probably off to win a Nobel prize.

Nobody has ever written as many enjoyable, fun-to-read crime novels as Agatha Christie. It's all about the storytelling and the pleasure of the reader. She doesn't want to be deep or highbrow.

The crimes in my books are committed by people who can't keep it together any more. They do something to express their own pain, and that has a terrible effect on somebody else.

I never write about CIA conspiracies or the FBI or mafia or anything like that because I just don't understand that world. But I think I do understand individual human harmfulness.

Crime fiction is a way of satisfying that nosy need to know.

I was working as a secretary in Manchester and thought I would always do that. Then I got this letter offering me a two-year fellowship where I could write; they would pay me a salary and give me a flat to live in. It was heaven.

In West Yorkshire, I'd have to drive three quarters of an hour to go shopping.

No highbrow literary type would ever say 'Moby Dick' is good but it's just about a whale, or a Jane Austen would be important if she wasn't just writing about romantic relationships.

When my children were very young, I was slated to go on a business trip. When it was nearly canceled, I decided I wouldn't tell anyone and go off for a week's vacation anyway. In the end, the trip went off as planned. But I was intrigued by the idea of an illicit holiday.

Agatha Christie never wrote books that just started with a dead body, and a 'Let's find out who the murderer is', which is kind of mysterious but not that mysterious. She always started with, 'How can this thing be happening; isn't it strange?'

I know a lot of crime writers feel very underrated, like they're not taken seriously, and they want to be just thought of as writers rather than ghettoised as crime writers, but I love being thought of firmly as a crime writer.

I'm snobby about books that aren't crime fiction: if I start reading a literary novel and there's no mystery emerging in the first few pages, I'm like, 'Gah, this obviously isn't a proper book. Why would I want to carry on reading it?'