Red Queen (Red Queen #1) by Victoria Aveyard
I did not like this book. Oh my, what a whining main character. Giving it two stars only because the plot-twist was pretty great, and because it was fast paced.
And because I imagined Lucas as this guy:
Don't read if the trend with female protagonists who hate themselves and every other female but fall in love with all the boys annoys you.
Read if you absolutely loved the Divergent- and Hunger Games-series. As books, mind you. (I liked Hunger Games, not Divergent). Both movie-franchises are good though.