There is also a CD of him reading parts of the book, including the entire Riddles in the Dark chapter. His Gollum voice is perfect (as you would expect since it's his creation) and it's really great hearing him act out the characters. :-)
Always wondered how closely my inner musician matched Tolkien's vision (filtered through watching Bakshi at an impressionable age). The answer was pretty closely :) Thanks to the OP! This was great!
Tolkien extract