I heard a story about her once,' said James. 'She was interviewing a psychopath. She showed him a picture of a frightened face and asked him to identify the emotion. He said he didn't know what the emotion was but it was the face people pulled just before he killed them.

No, people back home don't realize why there is this kind of need for heroes in America at the moment. People in Britain don't really understand what's going on here. They don't understand why Camp X-ray exists.

My ideal world was the early days of Twitter, where everyone was curious about each other and everyone saw it as kind of a window into people's lives where we could be compassionate and curious and empathetic and we could tell each other secrets.

I write funny nonfiction adventure books about crazy, serious worlds.

I am the neurological opposite of a psychopath, in that I feel anxious almost all the time. It must be great to not constantly feel like you’ve got someone living inside your face, shooting you with a mini Taser.

We have to understand how the extremists got the way they are. Without that kind of understanding, we'd never really get to know them. I put in nothing about their childhoods. But what I have put in is stuff about the weird symbiotic relationship between us and them.

Suddenly, madness was everywhere, and I was determined to learn about the impact it had on the way society evolves. I've always believed society to be a fundamentally rational thing, but what if it isn't? What if it is built on insanity?