Avatar, the last airbender omnibus

"Aang and friends must join together once again as the four nations' tenuous peace is threatened by an impasse between Fire Lord Zuko and Earth King Kuei! As the world heads toward another devastating war, Aang's friendship with Zuko throws him into the middle of the conflict! Available for the first time in an omnibus format, this is the official continuation of the Avatar: The Last Airbender series from Nickelodeon."--Publisher