In a number of important articles and books—most notably Agendas and Instability in American Politics (1993), The Politics of Attention: How Government Prioritizes Problems (2005)—Frank R. Baumgartner and Bryan D. Jones have pioneered a distinctive approach to the study of agenda setting that has shaped research in both the U.S. politics and comparative politics subfields. The Politics of Information: Problem Definition and the Course of Public Policy in America further expands on the theme of the political determinants, and implications, of “the organization and prioritization of information.” And so we have invited a number of political scientists from a range of subfields to comment on the book and on the research agenda more generally.