The Earth Kingdom Chronicles

The Earth Kingdom Chronicles book series is based on the Avatar TV series Book 2: Earth. These books go inside the thoughts of the characters during Book 2: Earth So far, only 6 books have been published. The books (in order of release) are:

5 The Tale Of Zuko
I am Prince Zuko. After being betrayed by my wicked sister, Azula, Uncle Iroh and I have sought new lives in the Earth Kingdom. It is humbling to wander as a refugee, but it has also opened my eyes to the pain the Fire Nation has inflicted on the world -- as well as on me. On one hand I am proud to be a prince of the Fire Nation, but on the other hand I feel very ashamed. What is my destiny? Is it to turn my back on the Fire Nation and start anew, or is it to restore my honor and earn back my rightful place as the future Fire Lord? I have yet to find out.

Triva
Outside North America, the title on the top right corner would be Avatar: The Legend of Aang rather than Avatar: The Last Airbender. They would also not have a number on the bottom right corner.