A perfectly serviceable fantasy ya with a fun twist. I liked the dynamic between Sky and her brothers but her relationship with her dad (and Maximus too as another adult in the story) felt off. Very unfortunate that the author sets up an exploitative societal structure (two even, if you count the one at Home and the one of the wyvern society on earth) but does nothing in the end except some half-hearted criticism by Sky to either critique or change these systems. Nevertheless, a fun and quick read.