Okay! So this was one of those books that was EXTREMELY hyped and I was nervous that the hype was going to make it fall completely FLAT for me... it did NOT! I loved this book. The MC (Zhu) was morally grey... I love morally grey characters, after all; aren't we all morally grey in real life? 
So, I'm sure you'll read the synopsis of this book and see that it's a Mulan retelling-but it's truly so much more than that. It also explores identity, self worth, cultural expectations, gender bias.... Ugh, this was just so good. Also, I did not know what to expect from the characters. I did not guess their choices and actions. I love being surprised in this way! Okay, so I won't continue because I'll get spoilery... Just Go Read This Book!