More so even than The Age, the New Yorker is a journal shaped and defined by its illustrators and cartoonists. For many decades it did not include photojournalism at all, and it only appears these days under sufferance. The cartoons contribute crucially to the ethos and style of a magazine that depends a lot on ethos and style. To think of the New Yorker is almost inevitably to think of the famous cover by Saul Steinberg that shows the cars, buildings, and people of Ninth and Tenth Avenues filling the foreground, then the Hudson River marking the edge of the real, figurative world, beyond which New Jersey, Nebraska, Japan, and the Pacific Ocean are just names on a vaguely conceived map. Parochial universalism fuelled by an ironic sophistication is the ethos of this famous image, and a thread of continuity in the work of the four New Yorker artists profiled in Iain Topliss’s fine and sensitive book.