He is the author of The Half Has Never Been Told: Slavery and the Making of American Capitalism (2014), which won the OAH Avery O. Craven Award, and Creating an Old South: Middle Florida’s Plantation Frontier before the Civil War (2002). He is a coeditor, with the late Stephanie Camp, of New Studies in the History of American Slavery (2006) and, with Louis Hyman, of the e-book American Capitalism: A Reader (2014). He teaches about the history of slavery, the U.S. Civil War, American capitalism, and digital history and offers a service-learning course that brings American students to work in the schools of rural Jamaica. He is also leading a project called Freedom on the Move, a collaborative effort in digital history that is building a crowd-sourced database of fugitive slave ads.