The Shadow of Kyoshi

The Shadow of Kyoshi is the second novel in a two-part series written by F. C. Yee chronicling the life of Avatar Kyoshi, taking place 412 years prior to the events of Avatar: The Last Airbender. Following on from its predecessor, The Rise of Kyoshi, the book will follow Kyoshi as she attempts to keep peace across the four nations, confronting a mysterious threat from the Spirit World. The novel is due to be released on July 21, 2020.

Overview
''Kyoshi's place as the true Avatar has finally been cemented—but at a heavy cost. With her mentors gone, Kyoshi voyages across the Four Nations, struggling to keep the peace. But while her reputation grows, a mysterious threat emerges from the Spirit World. To stop it, Kyoshi, Rangi, and their reluctant allies must join forces before the Four Nations are destroyed irreparably. This thrilling follow-up continues Kyoshi's journey from a girl of humble origins to the merciless pursuer of justice still feared and admired centuries after becoming the Avatar.''