Mythic Truth - More to feed the soul with regarding the Catholic spirituality contained in the tale.

Christianity and Middle-earth - Essays, poems, etc.

Frodo's Faith by Ralph C. Wood - an article by one of my very favorite Tolkien scholars.  He wrote The Gospel According to Tolkien which is one of the best ones out there - click on Book Reviews above.  See here for links to more of his essays.

The Philosophy of Tolkien by Peter Kreeft - another great book - click on Book Reviews above.

Interview with Joseph Pearce, another Tolkien scholar

Verlyn Flieger Home Page - Another of my favorite Tolkien scholars - click on Book Reviews above.