Fire " Sozin's Comet ". The Promise hardcover collection. Aang and his friends escort the Fire Lord and his family back to the Fire Nation Capital , but unbeknownst to them, unrest brews as the New Ozai Society prepares to make their move against the throne and children go missing from their homes under mysterious circumstances.
Book 2 of 5. While there, their elderly contact, Yahshi , introduces the gang to four unique benders.