I wonder if all writers experience the purgatory of titles, by which I mean being presented with an endless string of widely differing subjects but having absolutely nothing to say about any of them. Perhaps it is the natural hubris that comes with the work we do that persuades us that we should always have an opinion to hand, no matter what the circumstances. Take ‘heat’, for example. Heat is the prevailing circumstance right now, as I see it. Everything else, even the most