Michael O'Neill is Professor of English at the University of Durham, and has published widely on Romantic, Victorian, and twentieth-century poetry. His works include The Human Mind's Imaginings: Conflict and Achievement in Shelley's Poetry (1989), Romanticism and the Self- Conscious Poem (1997), and The All-Sustaining Air (2007), and, as editor, The Cambridge History of English Poetry (Cambridge, 2010). He is also the co-author (with Michael D. Hurley) of Poetic Form (Cambridge, 2012) and the co-editor (with Anthony Howe and with the assistance of Madeleine Callaghan) of The Oxford Handbook of Percy Bysshe Shelley (2013). His latest collection of poems is Gangs of Shadow (2014).