The Shadow of Kyoshi is the second novel in the Chronicles of the Avatar series and the second and last installment in a two-part series written by F. C. Yee chronicling the early life of Avatar Kyoshi. Picking up almost two years after the events of The Rise of Kyoshi, the book follows Kyoshi as she attempts to keep peace across the four nations, confronting a mysterious threat from the Spirit World.
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.
In addition to a physical copy of the book, an audiobook from Blackstone Publishing narrated by Nancy Wu was released digitally on Audible.
- Every pose or stance that's given a proper name in the book is from the Hung Gar style of Kung Fu, which was also the main influence for earthbending in the show.
- F. C. Yee had intended to put a scene that linked Kyoshi's dust-stepping technique to Suki's head-running technique from "The Boiling Rock, Part 2", showing that the skill is an evolution of dust-stepping. However, the scene ended up getting cut in drafting.
- Copies of the book from Barnes & Noble were mistakenly sold a week before the official release date in some areas.
- Exclusive editions of the book were made available by Barnes & Noble and Indigo, which contain six additional illustrations from Jung Shan Chang with commentary by F. C. Yee under a section titled "Collector's Art".
- At one point during the development of the book, F. C. Yee attempted to determine how many Fire Lord portraits there would be before Sozin if Kyoshi were to visit the Fire Nation Royal Palace as a teenager.
- A chapter cut from The Shadow of Kyoshi during its development was included as booklet in the Box Set of The Rise of Kyoshi and The Shadow of Kyoshi (released in October 2021). The booklet also included commentary by F.C. Yee illustrating his thought proccess during writing.
- The chapter would have been set after The Message and overlapped with Resignation; it featured Kyoshi trying to defuse tensions on Shuhon Island. She would have participated in a traditional Fire Nation game, attempting to win it in order to prevent the other contestants, the Keohso and Saowon clans, from descending into violence.
- The chapter was scrapped and replaced by Resignation after Yee, Michael Dante DiMartino, and other editors concluded that it was slowing the book's pace, lacked a proper connection to the main story, and was overall unnecessary. However, parts of it were recycled in other sections of The Shadow of Kyoshi.