One of the fundamental dimensions of urbanization is its radical transformation of nature. Today domestic animals make up more than twice the biomass of people on the planet, and cities are replete with nonhuman life. Yet current accounts of the urban remain resolutely anthropocentric. Lively Cities departs from conventions of urban studies to argue that cities are lived achievements forged by a multitude of entities, drawing attention to a suite of beings-human and nonhuman-that comprise the material politics of city making. From macaques and cattle in Delhi to the invasive parakeet colonies in London, Maan Barua examines the rhythms, paths, and agency of nonhumans across the city. Generating fresh conversations between posthumanism, postcolonialism, and political economy, he reveals how human and nonhuman actors shape, integrate, subsume, and relate to urban space in fascinating ways. Lively Cities is an agenda-setting intervention, ultimately proposing a new grammar of urban life.