McFadden studies marvels and miracle stories in Old English and Anglo-Latin prose, especially the concept of the monstrous. He has edited a special issue of Religion and Literature on visions of the other world and has published articles on Beowulf, the Letter of Alexander to Aristotle, the Venerable Bede’s Ecclesiastical History, the Liber Monstrorum, the *Exeter Book Physiologus*and Phoenix, the Old English lives of St. Margaret, and J.R.R. Tolkien’s use of Early Medieval monster lore in his fiction; he also has an article forthcoming on the Exeter Book riddles in their tenth-century context. His book project discusses the compilation of the Beowulf manuscript in the context of tenth-century English social changes.
Authoritative information may be found here.