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Alcock, Leslie, Arthur's Britain: History and Archaeology, AD 367–634. Penguin, London, 1989. ISBN 0-14-139069-7
Higham, N.J., The Kingdom of Northumbria AD 350–1100. Sutton, Stroud, 1993. ISBN 0-86299-730-5
Lowe, Chris, The Making of Scotland: Angels, Fools and Tyrants: Britons and Angles in Southern Scotland. Canongate, Edinburgh, 1999. ISBN 978-0-86241-875-5
Morris, John, The Age of Arthur. Weidenfeld & Nicolson, London, 1973. ISBN 0-297-17601-3