I'll be honest: I skimmed the back half of this book. It was easy to do because the chapters were short, the style was so plain, and the plot was predictable. The plot I can blame at least in part on the fact that Roku was already pretty well fleshed out in the TV series, but that doesn't really excuse all the wink-nudge references and Easter eggs in this book. It felt more like Solo than anything ever should. "Did you know Gyatso coined 'Flame-o, hotman' XD LMAO." 

Compared to the Yangchen books, which are good, and the Kyoshi books, which are great, this felt much more like laying out the foundations for the A:TLA series than those, which felt like interesting stories in their own right that develop and expand on the universe of Avatar. Also, Roku here just feels like a stupid kid with no real glimmer of who we know he becomes, which is again totally different from the other books in this series. Ribay doesn't do enough to really build the relationship between Roku and Sozin to show why Roku would be so completely blind to the fact that his best friend is becoming a genocidal sociopath. We just have to take it on faith in the narration, rather than being shown. 

Anyway, super disappointing. If there are more of these books by Ribay, I probably won't read them.