J.R.R./Christopher Tolkien
- The Fellowship of the Ring (5ish times)
- The Two Towers (see FotR)
- The Return of the King (6x? 7x?)
- The Hobbit (2x)
- The Silmarillion (9x)
- Unfinished Tales (once, and for reference)
- The Book of Lost Tales (1x)
- The Lays of Beleriand (1x)
- The Children of Hurin (1x)
- Beowulf and the Critics
- "On Faerie Stories"
Other
- The J.R.R. Tolkien Handbook
- Understanding the Lord of the Rings: The Best of Tolkien Criticism (a collection of essays)
- Tolkien: A Biography (by Michael White)
as wel as a handful of other books delving into the philosophies presented in the books...
love them all!