Tolkien

The Lord of the Rings

The Road to Middle-earth: How J. R. R. Tolkien created a new mythology

Tolkien and the Great War: The Threshold of Middle-earth

The Book of Lost Tales 2 (The History of Middle-earth, Book 2)

The Book of Lost Tales 1 (The History of Middle-earth, Book 1)

The Letters of J. R. R. Tolkien