Each of my book arrives at a form and a style that is appropriate to the subject.

The thing that strikes me, from looking at the names so far in the Donald Trump's Cabinet on the foreign policy side, is the one thing that unites them - and that's General James Mattis at the Pentagon, Mike Pompeo at the CIA, even Mitt Romney to become secretary of state - they're all very, very hawkish on Iran.

Quite often, ambition operates on a level of irritation. Not even jealousy, just irritation.

The process of book writing for me is entirely one of trial and error.

I'd have no rituals, but I'm a person of compulsive habit. That's just some awful residue of a ritual. And one of the reasons for that is my living this life, which is otherwise so free of obligations. It's not at all unusual for anybody who's independently employed to crave a way of living whereby they create the structures without which their lives would otherwise start slopping around all over the place.

For so long I didn't have any kind of readership at all - I'd get published, but not read - the idea of writing for an audience is so anathema to me, it's never bothered me.

Have more than one idea on the go at any one time. If it's a choice between writing a book and doing nothing I will always choose the latter. It's only if I have an idea for two books that I choose one rather than the other. I ­always have to feel that I'm bunking off from something.