Although relatively unknown today, Martin Behrman dominated New Orleans politics in the early twentieth century, serving as mayor from 1904 to 1920 and again in 1925 for a brief period before his death. His political organization—loosely referred to as “The Regulars,” “The Old Regulars,” or “The Choctaw Club”—was in complete control of the city during a period of rapid change. Behrman’s model of government, often called "Behrmanism" by detractors, was a pragmatic hybrid of machine politics, progressive reform, populism, and federalism that eventually found its way into Franklin Roosevelt’s New Deal and Huey Long’s political platform. The Boss of New Orleans is a masterful examination of Behrman’s remarkable life and political career, during which he rose from the orphaned son of immigrant parents to the Crescent City’s undisputed leader. As mayor, he blended consensus building with the exercise of raw power in ways that few politicians of the era could match, allowing him to navigate numerous controversial events, including the implementation of national prohibition and the forced closure of Storyville, the city’s red-light district. Behrman successfully managed the city’s last epidemic of yellow fever and built new schools and infrastructure that moved New Orleans along the path of modernity, earning a reputation as a hard-working, detail-oriented manager of city and machine affairs. As Criss demonstrates, with the singular—and deeply troubling—exception of the disenfranchisement of Black voters, Behrman led an era of truly progressive change in the Crescent City.