Unfortunately, most of the score from the rest of the series is not available to the public. I'm sure the Trackteam (the duo behind the sound of Avatar) would love. All the tracks from The Legend of Korra: Book 2. This list will keep updating even after the official release is out!. That tweet says it all, the Book 1 soundtrack went to be #1 on Amazon and among the top on iTunes, and it was still not enough for Nickelodeon.
Preview and download your favorite episodes of The Legend of Korra, Book 2: Spirits, or the entire season. Buy the season for $ The Legend of Korra: Book 2 Soundtrack: Dark Avatar.