Life often seems to defy logic. When a prostitute agrees to unprotected sex, or a teenage criminal embarks on a burglary, or a smoker lights another cigarette, we seem to be a million miles from what we would call rational behaviour. None of this makes sense – or does it? Tim Harford thinks it does. And by weaving stories from an attempted murder in Washington DC to a Soho speed-date, together with insights from an ingenious new breed of economist, he aims to persuade you that we are all, in fact, surprisingly logical.