I loved the concept and writing in this book! Really engaging and the circumstances in this world set up an interesting plot. The plot overall was fine. I enjoyed it but felt that the focus was on the wrong things. Personally, I would have loved more opportunities for the side characters and the ending. The MC Sophia and the evil King did their job to get the story forward but because of that lacked originality and consistency. 
I did not see the plot twist coming which is why the ending was fun to read. Definitely a more fast paced story.
I think the books strengths and weaknesses level out to a well-meant 3.5 stars! It works as a feminist YA fantasy but nothing more than that.