"In 1981 the first Arthurian Bibliography appeared, an exhaustive alphabetical author-listing of all critical material recorded in the standard Arthurian bibliographies up to 1978, with summaries and reviews where they existed. This was followed in 1983 by the second volume, giving full indexes by topic, key-word and individual work/author to form a complete subject-index of every major topic in Arthurian literature. Arthurian Bibliography IV compiled from the BBSIA, updates this invaluable reference work to 1998.