In 2016 Catherine Chidgey published her fourth novel, The Wish Child, a child’s-eye view of Nazi Germany. Since then the much-garlanded New Zealander has contrived to be not only conspicuously prolific but also intriguingly unpredictable. Though she returned to wartime Germany in her Women’s prize-longlisted Holocaust novel, Remote Sympathy, her work has ranged from the coming-of-age psychological thriller Pet to The Beat of the Pendulum, a “found” novel that drew on everything from conversations and social media posts to news bulletins and even satnav instructions to create a picture of one woman’s life over a year. The Axeman’s Carnival, published...