Walter Johnson is Winthrop Professor of History and Professor of African and African American Studies at Harvard University. His books include River of Dark Dreams: Slavery and Empire in the Cotton Kingdom and The Chattel Principle: Internal Slave Trades in the Americas.
An award-winning audio engineer for over forty years, Tom Perkins has expanded his skills to narrating and has more than sixty titles to his credit. He learned by working with the world's best voice talent during his career, and he continues to engineer a variety of projects.