Avatar: The Last Airbender: Smoke and Shadow Part Three: 06/16/16
Avatar: The Last Airbender: Smoke and Shadow Part Three by Gene Luen Yang is the conclusion about the kidnapping of the children from the Fire Kingdom. By now we know who is behind it but Zuko and Aang are at odds with how to deal with the situation.
At the heart of things is a family in turmoil. The aftermath of previous Fire Lord's campaign has left Zuko family torn. The worst of the aftermath is boiling over to affect Zuko's mother and half sister.
What I like about this trilogy is that even the villains' actions are understandable in the greater context. The children, while pawns, aren't mistreated (beyond being kidnapped, of course), and aren't ever in serious danger. The children are loved and won't be sacrificed for some ideological cause.
The next sequence starts in September with Avatar: The Last Airbender: North and South Part One