He is the author of "The Other Founders: Anti-Federalism and the Dissenting Tradition in America" (1999) for which he won the 2001 Cox Book Prize and "A Well-Regulated Militia: the Founding Fathers and the Origins of Gun Control in America" (2006). He is also the co-author of many other publications, including the textbook "Visions of America: A History of the United States" (2009). Recently, he authored an article on Salon regarding the 2011 Tucson shooting and Gun Control.