My upbringing was middle-class but my parents' families were both working-class so I had this odd combination of working-class background but in a privileged position.

We don't really go in for big family dinners, but Scottish people are famously confrontational. It's a cultural thing, so maybe we don't need to have them to clear the air. Also, traditional family food isn't as nice here so there's no payoff for traveling hundreds of miles.

Even if people do wrong, we're social animals, so what can we do about stopping them doing the same things in future? Saying people are 'bad' or 'evil' is just an unwillingness to engage; an unwillingness to try to empathise. That sanctimonious attitude doesn't help anyone

Most of the people who write to me are really clever, really engaged. They just want to say that they have read my book and liked it.

I respond very well to rules. If there are certain parameters it's much easier to do something really good. Especially when readers know what those are. They know what to expect and then you have to wrong-foot them. That is the trick of crime fiction. And readers come to crime and graphic novels wanting to be entertained, or disgusted.

People are interested in crime fiction when they're quite distanced from crime. People in Darfur are not reading murder mysteries.

There's always these giant baffling books, like 'The Da Vinci Code.' People say it's not as well written as 'Midnight's Children.' Why aren't people reading 'Midnight's Children?' Nobody knows why these phenomenons happen but they're great.