In an ideal world – by which I mean one that lives up to my most energetic fantasies – Paul Theroux and I would be meeting in some far flung and exotic place: on an empty platform in a distant railway station, or under a date palm in a dried-up desert oasis. Both of us would have dust on our boots. One of us would be wearing a bad hat, or even a good one. Our conversation, which would unfold like an old map, would come with a soundtrack comprising the cries of market traders, the whistle of a train and the bellow of a camel.