All the stereotypical racist stuff aside, because I'm not really sure this book is sending the right kind of message to young adults, I'll just comment of the story line itself. 
 I luuurve sci-fi and all things space related. This was me yesterday, by the way, after reading about TRAPPIST-1: 
 Because, honestly, how fucking cool is that? Anywhooo... this book lacked in a lot of places for me. I wanted more world building and descriptions of planets, space, space ships...? All juicy things sci-fi. 
 Right. Ok. But also I wasn't that thrilled with the "gift" the heroine possessed. Because she was constantly in pain and the only way for her to temporarily get rid of it was to touch someone else and make them dead. 
 And by the end of the book her ability "transformed" somehow where she was able to control it but I was confused the fuck about it. And still unimpressed. I was, actually, pretty unimpressed with everyone's abilities in this book. There wasn't much kick-ass action going on and disappointed cat is disappointed.