In the late nineteenth through mid-twentieth centuries, the anarchist effort to promote free thought, individual liberty, and social equality relied upon an international Spanish-language print network. These channels for journalism and literature promoted anarchist ideas and practices while fostering transnational solidarity and activism from Buenos Aires to Los Angeles to Barcelona. Christopher J. Castañeda and Montse Feu edit a collection that examines many facets of Spanish-language anarchist history. Arranged chronologically and thematically, the essays investigate anarchist print culture’s transatlantic origins; Latina/o labor-oriented anarchism in the United States; the anarchist print presence in locales like Mexico’s borderlands and Steubenville, Ohio; the history of essential publications and the individuals behind them; and the circulation of anarchist writing from the Spanish-American War to the twenty-first century.