A Biographical Dictionary of Dark Age Britain: England, Scotland, and Wales, c.500–c.1050, Routledge (1991), with
Alfred P. Smyth and
D. P. Kirby. Williams wrote the English entries.
The English and the Norman Conquest (Woodbridge, 1995)
Land, Power and Politics: the family estates and patronage of Odda of Deerhurst (Deerhurst, 1997)
Kingship and Government in Pre-Conquest England, c. 500–1066 (London, 1999)
Æthelred the Unready: the ill-counselled king (London, 2003)
The World Before Domesday: the English aristocracy, 900–1066 (London, 2008)
References
Williams, Ann, Kingship and Government in Pre-Conquest England, c.500–1066 (London, 1999), back cover