The Lord of the Rings JRR Tolkien Audiobook Set on Cassette. The Hobbit - unabridged - 7 cassettes - 11 hours - 1991. The Fellowship of the Ring - unabridged - 12 cassettes - 20 hours - 1990. The Two Towers unabridged - 10 cassettes - 17 hours - 1990. The Return of the King - unabridged - 11 cassettes - 15 hours - 1990.