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1. Michael Prestwich, Edward I, Los Angeles: University of California Press, 1998.
2. Michael Prestwich, The Three Edwards: War and State in England 1272-1377, London: Routledge, 2003.
3. Diane M. Williams and John R. Kenyon, eds, The Impact of the Edwardian Castles in Wales, Oxford: Oxbow Books, 2010.
4. Nicola Coldstream, ‘Architects, Advisers and Design at Edward I’s Castles in Wales’, Architectural History 46 (2003): 19-36.
5. John R. Kenyon, The Medieval Castles of Wales, Cardiff: University of Wales Press, 2010.