Book excerpt: A penetrating analysis of the real-photo postcard phenomenon of the early 1900s. These cards depict the now vanished world of small-town America, but also represent a pivotal stage in the evolution of photography. Their head-on style inherits something of the plain aesthetic of the Civil War photographers, while anticipating the great 1930s documentary artists such as Walker Evans. Fusing his skills as a chronicler of early 20th-century America, a historian of photography and a keen critic, Sante shows how these postcards offer a revealing 'self-portrait of the American nation'.