Nyx has been born and raised to marry a demon. Her whole life she was treated as a weapon, never loved by her family. She resents her father, who made the bargain and is cold with her, her aunt who instructs her and sleeps with her father, and twin sister, the one chosen to live. 
 But when she meets Ignifez, he's different that what she imagined. She knows she has to follow her father's plan and try to end the curse that has fallen in the island, but she discovers that the curse may not be as simple as she imagined. 
 I really liked this book. At first, it reminded me Uprooted, but at the end, I felt it really similar to Wintersong. I didn't love it as much as the first, but I enjoyed it more than the last. It captivated me and it was enchanting and sweet. I could feel like it was a retelling of the Beauty and the Beast but at the same time, it was really different, with its own mythology and plot twists. 
 I loved Ignifex, but I wish we could get to know him more. At times he felt a bit flat. Shade was a great character, and the same can be said about Astraia, but I wish we could see a bit more about her true personality. 
 And Nyx... I loved her too. She is strong but full of anger and is one of the darkest characters I've read in a YA story. Definitely the first that betrays her lover willingly . 
 I loved the ending, it felt right and perfect. Ignifex being one with Shade and being the last prince, and sacrificing himself for his kingdom was perfect. It was bittersweet that reality changed and still Nyx's mother died, but in this new time she had a great relationship with her sister and a better one with her father and aunt, and at the end gets to save Lux.