Who wrote the avatar last airbender books?

The Avatar: The Last Airbender books were written by Gene Luen Yang. He wrote the following graphic novels:

* The Promise (2012)

* The Search (2013)

* Smoke and Shadow (2014)

* North and South (2016)

* Turf Wars (2018)

The books were published by Dark Horse Comics and continue the story of the Avatar universe after the events of the animated series.