Arguably no medieval English literary work has had as far and wide a reach as Sir Thomas Malory's Le Morte Darthur; among the many adaptations are Tennyson's Idylls of the King, T.H. White's The Once and Future King, and the Lerner and Loewe musical Camelot. It might also be argued that the late twentieth- and early twenty-first-century tradition of fantasy literature-from Tolkien's Lord of the Rings to George Lucas's Star Wars and beyond-owes...