Christopher is Emeritus Professor of English and American Studies at the University of Winchester. He has a doctorate in nineteenth-century studies from Columbia University.
He is Chair of the Editorial Committee of the African American Research Library, an international electronic-text project engaged in the publication of African American titles through the Virginia University Press.
He is on the Editorial Board of FORECAAST. In conjunction with the LIT Press, FORECAAST produces books in the field of African American research.
He is the owner-publisher of the Estcourt Press.
He is a reader for Cambridge University Press.