The A to Z of the Progressive Era is the most comprehensive and coherent reference work on the Progressive Era. Through its chronology, introductory essay, bibliography, appendixes, and hundreds of cross-referenced dictionary entries on the key events, people, organizations, and ideas of the period, this resource is a lively, complete, and accessible overview of this significant era.

Catherine Cocks is an independent scholar. Peter Holloran is associate professor of history at Worcester State College. Alan Lessoff is professor of history at Illinois State University and editor of the Journal of the Gilded Age and Progressive Era.