Avatar: the Last Airbender2001
(Avatar)
The Promise, Part One
by Gene Luen Yang
The war is over...but the adventure has just begun!
Picking up exactly where Avatar: The Last Airbender left off, The Promise takes Aang to a Fire Nation colony in the heart of the Earth Nation, where tensions between neighbors threaten to shatter the world's newfound peace—putting the Avatar on a collision course with one of his closest friends, Fire Lord Zuko!
— from OpenLibrary
2 editions at OpenLibrary