Instafame charts the impact of Instagram—one of the world’s most popular social media platforms—on visual culture in the mere eight years since its launch. MacDowell traces the intuitive connections between graffiti, street art, and Instagram, arguing that social media’s unending battle for a viewer’s attention is closely aligned with eye-catching ethos of unsanctioned public art. Beginning with the observation that the scroll of images on a sideways phone screen resembles nothing so much as graffiti seen through the windows of a moving train, Macdowell moves outward to give us a wide-ranging look at how Instagram has already effected a dramatic shift in the making and viewing of street art.