John Haffenden is Professor of English Literature at the University of Sheffield. His books include The Life of John Berryman, W. H. Auden: The Critical Heritage, Viewpoints: Poets in Conversation, and Novelists in Interview; and he has edited Berryman's Shakespeare and several collections by William Empson including Complete Poems. The first volume of a biography, William Empson: Among the Mandarins, was published in 2005. Haffenden is a Fellow of the Royal Society of Literature and of the English Association, and has been a British Academy Research Reader and a Leverhulme Research Fellow.