In conclusion, never trust a man who's condescending!
If you loved the Grisha Trilogy, i think you'll like this one.
This is what I call a well-made mystery. I couldn't wrap my head around all the information until Valko was arrested, and even after that, a few suspicions remained. In short, the author did a good job of putting suspicion onto every male character of the book: Valko, Simeon, the Vulkr ambassadors, Dragan.
I even suspected Georgi at some point, poor Georgi, he's too good for his own good.
Everyone had something to hide and it made it difficult for the protagonist to understand what was really going on. Nevertheless, the important elements to the plot and the story were all there and the author did a really amazing job at inserting them at points where they would be easily dismissed.
I honestly love that the love interest was the villain, it's original and I didn't want to believe it, until he started to be condescending, and at that point i KNEW he was bad, and I started to hate him: he was treating her like a doll, and it was really creepy, but already before that, when he was her teacher, he didn't seem to teach her some very important stuff.
I also love the layering. Valko and Aleksi were the obvious answers, but something was off. I didn't believe Valko was the culprit for a second (even tho he was suspicious at times). Then, the Vulkr ambassadors were too eagerly mean to actually be working to kill the entire royal family, but i couldn't dismiss them either.
Simeon, I'm sorry, for a moment I thought you could be planning the political scheme of the century, but you have to understand: you were suspicious as hell!
The main character was the naive cliché, but it was coherent. The only thing is that she wasn't suspicious at all of Dragan for the salve, when Hridtina told her immediately he sent the medicine to her. That was really annoying, give that I remembered it clearly while she had Hristina repeat that to her. But she was in love, I guess. I didn't trust Dragan for a second since the beginning, because saying that the Mesmers are superior to humans while the royal family is being killed like moths is suspicious, boy! The your-ora-is-broken-because-of-childhood-trauma thing was a little... "campata in aria" we'd say in italian, baseless. So when it was revealed it was a lie and the explanation was another (one coherent and already introduced in the book), i was really happy, because again, it was coherent. Dragan gave himself away because he didn't expect Adrijana to find what he was doing, but also because he couldn't control Silviya, who then did as she pleased. He was startled and he came out with something ridiculous, but possible, given that no one in that room new enough about Mesmerism to contradict him.
I found myself at 3 am trying to find the real villain and to connect all the loose ends and I loved it!