The artistic process seems to be mythologized quite a lot into something far greater than it actually is. It is just hard labor. […] As anyone who actually writes knows, if you sit down and are prepared, then the ideas come. There’s a lot of different ways people explain that, but, you know, I find that if I sit down and I prepare myself, generally things get done.

One cannot overemphasize the importance of observation and a full assessment — the failure to do so leads to some of the greatest mistakes, not only in war but also in business and government. A full assessment is critical. To properly manage any business situation, you need to perform a full and complete assessment of it. In business, you have to understand your competitors, their distribution, their economics, their innovations, and their strengths and weaknesses. You also need to understand customers and their changing preferences, along with your own costs, your people and their skills.

Those lactate sessions were the worst. I'd be in a lab on a turbo trainer and I'd do four 30-second efforts at 100% effort. It sounds so innocuous but the difference between 99% and 100% is huge. You can finish at 99% and you'll be hurting but if you push a tiny bit more – and that's the bit that makes the difference to your training – your legs just grind to a halt. It's like your engine is seizing up. My coach would unclip my feet and pull my leg over the saddle so I could just slide off onto a mat and curl up in a ball.

I myself, as I’m writing, don’t know who did it. The readers and I are on the same ground. When I start to write a story, I don’t know the conclusion at all and I don’t know what’s going to happen next. If there is a murder case as the first thing, I don’t know who the killer is. I write the book because I would like to find out. If I know who the killer is, there’s no purpose to writing the story.

I don’t think of it as research. I read for interest and enjoyment, and when I cease to enjoy it I stop. I didn’t research quantum mechanics but I was fascinated by the mystery that lies in the foundation of the observable world, of which the most familiar example is the wave/particle duality of light. I thought it was a good metaphor for human personality. The language of espionage lends itself to this duality—think of the double agent.

The look of the thing is one thing. The sound of it is more important. … When you write a play, it makes a certain kind of noise in your head, and for me rehearsals are largely a process of trying to reproduce that noise. It is not always wise to reproduce it in every instance, but that’s another question.