I like the concept of teenagers and philosophy.

I write with teenagers in mind.

Thought, like any parasite, cannot exist without a compliant host.

People absolutely embraced such a concept.

I just love the idea that people disappear into the story for a while. You grab a book, and you want to get back to it, and your life becomes a bit of an interruption. I would love readers to feel like that.

I didn't study science beyond high school level, but I'd been reading a lot of science books by people like Richard Dawkins, Matt Ridley and Daniel Dennett. I also spent a year working on a fellowship in a research centre - the Allan Wilson Centre - where I got a hands-on look at their work sequencing DNA.