"Kyoshi's place as the true Avatar has finally been cemented--but at a heavy cost. With her mentors gone, Kyoshi voyages to the Southern Air Temple, where she can master the elements beyond what she could have ever imagined. But while her bending grows stronger, a mysterious threat emerges from the Spirit World. To stop it, Kyoshi, Rangi, the daofei, and their reluctant allies must join forces before the four nations are destroyed irreparably." --...

"This taut and provocative fourth installment in the Chronicles of the Avatar series follows Avatar Yangchen as she charts the course of her legacy, finally making peace with her choices and facing Avatarhood with the courage it demands."--Publisher's description.