3 books in series

Avatar: The Last Airbender: The Rift

Avatar: The Last Airbender: The Rift is a 3-book series with 3 released primary works first released in 2014 with contributions by Gene Luen Yang, Michael Dante DiMartino, and Bryan Konietzko.

Avatar: The Last Airbender - The Rift, Part 1
Avatar: The Last Airbender - The Rift, Part 2
The Rift, Part 3