Encyclopedia of the Medieval World.Edited by Edward D. English. London: Facts on File, 2005. 2 volumes.
[St. Michael’s 1st Floor Reference Area – D114 .E55 2005]
This 2-volume set covers a range of topics on mediaeval life (e.g. people, literature, science, law, institutions). Cross-references and further reading bibliographies, plus a substantial index in the 2nd volume, make the roughly 2000 entries easy to use. The 2nd volume includes 2 appendices (Monarchs and Rulers of the Medieval World and Genealogies), as well as a 50-page bibliography broken down into categories (e.g. encyclopedias and dictionaries, general overviews, and more specific topics such as the British Isles). This source has the advantage of being more up-to-date than the two listed above.