FanficRecs Jacob Greyson's review of Book 2
Book 2, on the other hand, is a complete work, a retelling the entire second season in this alternate universe where Jeong Jeong never became a defector, and the whole world changed because of it. Because of a few tiny changes in the first book, the motivations are vastly different for many of the principle characters. Since each book also seems to encompass a year, instead of 3 months, they are also growing up rapidly as well. Zuko loses his anger to melancholy, and Azula's obviously not on an even keel even when she's sent to the Earth Kingdoms. And Ty Lee? Well, she's not sure if Azula's is the side she needs to be on. While the events seem to follow the same general course, there are a few surprises, and some moments which are downright heartwarming.
FanficRecs Jacob Greyson's review of Book 1
Book 1 is a series of vignettes which happen along with the canon of season one. The author warns of a number of changes right in the first page; Namely, that Suki is now 27 and sounds like a Renegade Commander Shepard, Sozin's Comet is two years away, and for reasons that aren't really gotten into in the first 'book', Ty Lee finds herself stranded for a year on Kyoshi Island. Because of the story's structure, practically unrelated vignettes that can lurch forward through time quickly, it's a bit disorienting, until it becomes much more steady toward the end of the 'first season'.
FanficRecs Jacob Greyson's review of Book 3
Book 3: from the very beginning, Ty Lee is a part of the Gaang, Zuko's firebending is rapidly growing to equal his sister's and Azula herself is already starting to hallucinate. Sokka is now Ty Lee's boyfriend, while Aang and Katara are closer then they ever were even at the end of the series, and everybody out to get them all seem a lot more lethal than they used to be. As well, Ty Lee turned out to have been an airbender, and airbending unconsciously since Book 2. During the story's equivalent to Boiling Rock, Mai pulls a Heel Face Turn, leaving Azula alone and on the fast track to insanity. Sokka seems to be powerleveling in the last few episodes, Aang actually has a plausible reason for almost getting Ozai'd, and everything gets turned up to eleven. And then, just when it all seems sorted, the sequel hook hits. Contains frequent Word Of God and clarifications of the world, such as the nature of shamans and the differences between benders being between power and skill. Still, while some characters (ie, Sokka, Ty Lee) ring true, others seem to fall comparatively flat. And there's a big YMMV glut in the epilogue. Like Sokka dicovering, to his great dismay, that he's a waterbender.