The author, Kuzonkid7, loved all the Avatars before Aang. However, he did think that Avatars like Kuruk and Yangchen were not explored enough, and some weren't explored at all. So when he watched a rerun of The Avatar State, he noticed a man who was not Roku, and that is where the story begins. The author had several ideas, both good and bad. For example, the author planned to kill the entire character cast so he could make them come back from the Spirit World. Other ideas were slightly better, and featured in the books. Yet some were so stupid [weredragons] that he would mention it in the series as a joke. As the idea progressed he finally got the page on the portal.
An ever-changing world keeps the Avatar busy, as the Fire Nation changes power from the sages to the Fire Lord. On a peaceful mission, he realizes the Air Temple's children are disappearing. The Avatar must stop the kidnappers, even if it kills him.
Book 1 Plot
Disharmony in the Fire Nation may cause a civil war. Assassins lurk in the temples, waiting to kill. Avatar Gatton, through tragedy, has overcame everything in his path. With the help of his grandchildren, he will uncover a great plan. Conspiracies are normal in this chapter; key to the plot of the next book they shall be.
Book 2 Plot
You have all heard of the four Air Temples, but have you heard of the fifth, the Central Air Temple? In a vision, Gatton sees an evil Avatar being born there, but when he arrives, he discovers that Air Nomad children are going missing. Avatar Gatton, along with his grandchildren, will go on an Air Temple field trip which they will never forget. For the overview, see here.
Note: Some characters will be appeared in multiple books.
Despite being a moderately known series, The Lost Air Temple has received generally positive feedback from other users. So far, the chapter with the most known readers is the finale, a chapter that finishes of Book 1. The chapter Siege of Sages was nominated by the council to the Fourth Fanon Award and won.