Morgoth's Ring : the later Silmarillion. Part One : the legends of Aman
The Return of the Shadow
The Silmarillion
Sir Gawain and the Green Knight, Pearl, Sir Orfeo
The Christian World of the Hobbit
Good news from Tolkien's Middle Earth; two essays on the "applicability" of the Lord of the Rings
The Magical Worlds of Lord of the Rings
The Messiah Comes to Middle-Earth
Tolkien and the Lord of the Rings