Most readers will probably know in advance if they are going to enjoy or be offended by Rod Liddle's new book. Liddle is, by some margin, Britain's most prolific pundit, giving us the benefit of his opinions each week in The Sunday Times (twice), The Sun, The Spectator and sometimes also GQ and Country Life. His loyal readers will love it, while people who regard him as racist and misogynist, and are not convinced that his puerile rudeness is merely a wind-up aimed at what he calls "faux-Left social liberals", won't.