I don't know how to review this book without spoiling anything... let's just say IT WAS SOOO GOOD! The book felt like a breakpoint in the series, the moment where everything starts to fall into place, all that is left is the resolution. 
 The book starts with Aelin back in Rifthold, wanting to know what has happened while she was away. She has so much to accomplish that everything seems to be out of reach: free her cousin, get the amulet, decide what to do about Dorian who seems to have been consumed by de Valg prince, free the magic... and, of course, defeating the king and get her country back like in the last books. 
 On Morath, Manon starts to question their alliance with the king and the dark things going on by the duke in the dungeons, finding herself being torn between what she feels is right and honor to her matron and the ways of her people. Her character development is amazing and I feel we'll see a lot more of her in the next books. (view spoiler)[ I'm dying to see her with Dorian, that ending with him remembering her name while looking at her from the distance was really something. (hide spoiler)] 
 There are new characters that complement the story perfectly while we continue to follow the old ones in this new adventure. There is fast paced action, manipulations, plotting, sexual tension (view spoiler)[ Although I'm hyperventilating, I'm a bit scared about the whole "him being immortal and her being mortal" issue, I don't want to be sad (hide spoiler)], and so many more things! It made my heart race many many times. 
 I can't wait for the next two books to be released! The wait will be horrible...