How are markets made? In Automating Finance: Infrastructures, Engineers, and the Making of Electronic Markets (Cambridge University Press, 2019), Juan Pablo Pardo-Guerra, an assistant professor in sociology at the University of California, San Diego, explores the history of the finance industry to understand the role of markets and technologies in contemporary capitalism. The book offers a detailed theoretical engagement with the personalities and technological changes underpinning the modern system of automated finance. It uses the case study of the development of the London Stock Exchange, looking at the social relations embedded in financial markets, before moving to look at the global, American system. Charting the move from trading floors to trading screens, the book considers individuals and broader social systems shaping enabling and constraining behaviour in the world of finance. Overall the book offers a rethinking of the meaning of markets, and is essential reading across social science, history, and management studies.