One of Us is littered with posh people behaving badly, and normal people caught in the crossfire, in a futile search for justice. But where Hollinghurst’s The Line of Beauty, with its sumptuous prose and meticulous attention to detail, felt so real that the emergence of a dancing Margaret Thatcher was utterly seamless, One of Us is a parody of contemporary British life, a 350-page episode of Dead Ringers.