The Earth Kingdom Chronicles
The Tale of KataraBook - 2008
Katara is traveling through the Earth Kingdom with her brother, Sokka, and Aang, the Avatar. After she an Aang studied Waterbending at the North Pole, they set off to find an Earthbending teacher. But they're having a hard time getting along with him. Meanwhile, Prince Zuko and his sister Princess Azula are hot on their trail.