The following is a list of written sources that provide useful information on castles. They are divided into three sections: general sources, sources solely concerned with Herefordshire and historical sources.
R. Allen Brown, English Castles, Book Club Associates, 1977
J. Burke, Life in a Castle of Medieval England, Batsford, 1978
Eilert Ekwall, The Concise Oxford Dictionary of English Place-Names, Oxford University Press, 1970
Malcolm Hislop, Medieval Masons, Shire Publications, 2000
Hyam and Baker, Timber Castles, (especially pages 43-45 for Ewyas Harold Castle)
Colin Platt, The Castle in Medieval England and Wales, Secker & Warburg, 1982
N.J.G. Pounds, The Medieval Castle in England and Wales, Cambridge University Press, 1990
Trevor Rowley, English Heritage: Norman England, B.T. Batsford, 1997
M.W. Thompson, The Decline of the Castle, Cambridge University Press, 1987
M.W. Thompson, The Rise of the Castle, Cambridge University Press, 1991.
Bruce Coplestone-Crow, Herefordshire Place-Names, BAR British Series 214, 1989
George Nash & George Children, An Anatomy of a Castle: The Weobley Castle Project, Logaston Press, 2003
Nikolaus Pevsner, The Buildings of England - Herefordshire, Penguin Books Ltd., 1963
P.M. Remfry, Brampton Bryan Castle 1066-1309, SCS, 1995
P.M. Remfry, Clifford Castle 1066-1299, SCS, 1994
P.M. Remfry, Kington and Huntington Castles 1066-1416, SCS, 1997
P.M. Remfry, Longtown Castle 1048-1241, SCS, 1997
P.M. Remfry, The Mortimers of Wigmore, SCS, 1995
P.M. Remfry, Richards Castle 1048-1219, SCS, 1997
P.M.Remfry, Wilton Castle 1066-1644, SCS, 1998
Rev. Charles J. Robinson, A History of the Castles of Herefordshire and Their Lords, Books & Book Services Ltd. (reprint), undated
Mike Salter, Castles of Herefordshire and Worcestershire, Folly Publications, 1989
Ron Shoesmith, Castles and Moated Sites of Herefordshire, Logaston Press, 1996
J. H. Turner, Herefordshire Countryside Treasures, Hereford and Worcester County Council, 1981
John Leland, Leland's Itinerary, 1538
Michael Swanton (translator and editor), The Anglo-Saxon Chronicle, J.M. Dent Publishers, 1996
Frank and Caroline Thorn (eds.), Domesday Book 17: Herefordshire, Phillimore, 1983