By Answering on Avatar: The Legend of Korra Episode 12 from Avatar: The Legend of Korra Episode 12 comment Remember how ???Avatar: the last airbender??? started with book number 2? its because book 1 is for air, and he already mastered air back then, so the other books were about how he mastered all the other elements, but rigth now Korra has mastered every element except air, it would be pointles