David Paroissien is Emeritus Professor of English at the University of Massachusetts, Amherst, and Professorial Research Fellow at the University of Buckingham. He edits Dickens Quarterly and co-edits, with Susan Shatto, the Dickens Companions series. He is the author of The Companion to Oliver Twist (1992), The Companion to Great Expectations (2000), and has edited The Mystery of Edwin Drood for Penguin (2002).