This might seem like an eccentric book. As Labour prepares for power after four consecutive general election defeats, Andy Beckett is interested not in what is to come but what has just been. He is particularly preoccupied by the rise of Jeremy Corbyn, what happened to him as party leader and what his leadership represented. The Searchers is mostly fair-minded, diligently reported and researched, but leaves you in no doubt that Beckett, a Guardian columnist, is a sympathetic Corbynite. In the long, final section, covering 2015 to the present day, Beckett writes nostalgically about the excitement of the early years...