Pastoureau, Michel. Heraldry: An Introduction to a Noble Tradition. New York: Harry N. Abrams Inc, 1997.

Wagner, Anthony. Heralds and Ancestors. Great Britain: British Museum Pulications Ltd, 1978.

--Heralds of England. London: Her Majesty’s Stationery Office, 1967.

--Heralds and Heraldry in the Middle Ages: An Inquiry into the Growth of the Armorial Function of Heralds. Great Britain: UP Oxford, 1939.

Pognon, Edmond M, trans. Le Livre des Tournois du Roi Rene. Paris: Editions Hercher, 1986.

http://pages.ripco.com:8080/~clevin/tristram.html
A page that discusses symbolism in the heraldry of Authurian romances.

http://renaissance.dm.net/heraldry/index.html
A page that includes some basic information about heralds and heraldry as well as some interesting information about Elizabethan heraldry.

http://www.sca.org/heraldry/primer/
A heraldic Primer that goes step by step through the basics of heraldry

http://www.wctc.net/~randomsf/rollofarms.htm
A collection of some links to pages with medieval rolls of arms on the www.