I didn't love this as much as the first book, but it was overall a good sequel and conclusion to the story. I loved being back with Ana, Di, Robb, Jax and all the other characters. I loved their interaction and "found family" is still one of my favorite tropes and it's done beautifully in this duology. The whole concept of the metals fascinated me already in Heart of Iron, and it didn't disappoint in this book as well. The plot was intriguing, even though I saw some parts of it coming, which combined with the feeling that sometimes everything felt a little rushed took one star away. Overall I'm really happy with the outcome and it's definitely something that will live with me for a while and it's something I will eventually want to return to and reread it.