According to the introduction this book is intended to evoke "Crouching Tiger, Hidden Dragon" (thought that title is not explicitly referenced)--feminine superhero-martial arts-wire fu action. And it delivers on that pretty well. I find myself agreeing with others that the focus of the book felt off--I didn't care that much about Lin Chong and Li Junyi as protagonists. The other characters had more potential to be interesting, mostly because they didn't carry that baggage about loyalty to a corrupt empire. That may be what is playing out in real life, but I think most of us are over it. The author's work to build those protagonists actually detracted from enjoyment of the action.
Overall it was OK, but felt like it went on for a long time. I can't quite give it four stars.