I’d best declare my own bias. As a writer, I’m interested in the exploration of ideas. I’ve done a great many expeditions and each one was unique. I’ve lived for months alone with isolated groups of people all around the world, even two ‘uncontacted tribes’. But none of these things is of the slightest interest to anyone unless, through my books, I’ve found a new slant, explored a new idea. Why? Because the world has moved on. The time has long passed for the great continental voyages – another walk to the poles, another crossing of the Empty Quarter. We know how the land surface of our planet lies; exploration of it is now down to the details – the habits of microbes, say, or the grazing behaviour of buffalo. Aside from the deep sea and deep underground, it’s the era of specialists. However, this is to disregard the role the human mind has in conveying remote places; and this is what interests me: how a fresh interpretation, even of a well-travelled route, can give its readers new insights.