This book sets up a world, where women have little choice in how their life turns out. Serina thinks she can give her sister, who is her handmaiden, and herself a comfortable life by becoming the Heirs Grace. Nomi doesn't believe in this. She doesn't believe succumbing to the Heir will give them freedom, she sees it as mother cage. But then something happens and everything is turned upside down. Nomi is chosen as a Grace and Serina is send to the dangerous Mount Ruin, a prison for women who defy this worlds strict rules. First of all I loved this characters. Serina goes through such an enormous journey in this book and I loved seeing her unfold and embrace her fury. I heard people say this would be a feminist read and it truly was. At its core, it's about women fighting their oppression in any way that they can. Women standing up to the men that are trying to keep them down. I loved every second of it. I loved seeing women making each other stronger instead of tearing one another down. Other than that, I was seriously into the romance. It's very rare to see romantic relationships in Ya that revolve around mutual respect, where the men don't always need to take care of the women and also understand they don't have to. Usually they will still be the golden saviour, even it the woman is very capable herself. This book did it. It gave me romance to be excited about, romance I could dive into. Men, who respected the women choices and helped them. There is one instance that could be interpreted in a bit of a different light, but there is no man who ever just took what he wanted from a struggling woman. There actually were some attacks on one of the sisters, but it never got far enough to really trigger me. I don't wanna reveal too much about the plot, but it had so many twists and turns and legit managed to fool him. Which actually got me very angry, I don't like fall into traps, I usually think I'm too clever for that, but this really got me. I wanted to put the rating down cause I was so annoyed it got me, but I really can't do that. It was a good twist and I'm excited to see, where this series goes in the future.