The information on this web site is entirely derived from other sources. Some of these are online source but much is from written sources.
I have tried to produce a bibliography of the texts most useful to understanding the medieval fortifications of England and Wales.
For each castle or fortification an individual bibliography is given but some sources have been extensively used or are gazetteers of castles in a particular area.
Journals probably represent the best source for up to the minute informed opinion and for detailed reports.