-From the lanes of Ba Sing Se-

Kai was one boy in the midst of millions of citizens of Ba Sing Se, yet he became the Avatar. All he wants is to tend to his ailing mother, but now he must fulfill a duty far greater than he could imagine. The rise of the Republic City spirit portal seemed to mark the beginning of an era of peace, but this monumental event has stirred something far older than the earliest tomes of history.....

I do not own any of the Avatar verse locations or concepts.
Shout out to the owner of the cover artwork: I do not own this and hope to find the artist to mention them.