The latest Lord of the Rings Online expansion, Mordor, has been available to play for some time now, but it’s taken a bit longer for the accompanying soundtrack to become available for purchase. (This might have something to do with the release of the 10th Anniversary soundtrack around the same time.)
Like the 10th Anniversary album, the Mordor soundtrack is available from Huge Sound Records and features songs from composer Chance Thomas. However, since it doesn’t consists of nearly as many pieces, it’s gonna cost you a few bucks less. The entire album is available for $9.99. Of course, you do have the option to purchase each piece individually, but unless there are only 3-4 pieces you like, I’d just drop the ten bucks.
A full track list is available at the link above.