There's no doubt this is one of the psychological thrillers that really lives up to its genre. While you are continuing to turn pages, your curiosity will also increase. I liked this book because it was told in a way that could be easily understood, especially about the mental well-being of the main characters. I also like the individual POV of Alicia and Theo; I can create scenarios and clearly decipher their facial expressions because of the author's talent in writing!
I will give it 3.8 stars, though, because if you look at it as a puzzle, some pieces were missing.
SPOILER ALERT
First, why does Paul not tell the truth that Alicia has spared her money? Is it because Paul was afraid that Theo would tell his mother (Lydia) about it? It seems the answer is no because Paul already trusts Theo. Or, let's say, Paul admits that he has borrowed money from Alicia. What will be the hold of Theo on Paul because of that? or perhaps one of them was lying.
Jean-Felix warned Alicia not to trust so easily, does that mean Jean-Felix knows about the infidelity of Gabriel?
It was clear that Alicia hated his father, so why would she hurt herself because his father killed himself? She hated him, and after learning that his father had killed himself, Alicia herself attempted to do the same. It does not harmonize, considering that when Alicia fired gunshots at Gabriel, he saw his father in his eyes. Is it possible that Alicia had other reasons for her suicide attempt? Then what is it and why? That wasn't explained in the book.
Tanya was afraid of Max, that was at least the view of Theo. If that's true, then what is the reason? Or is it because Tanya knows Max wouldn't be happy if she gave Theo more information about Alicia?
Lastly, the book was written mostly from the POV of Theo, and he is way too innocent in his therapy session with Alicia that I thought he may have a disorder that makes him forget the details or that specific tragic night, and so I was surprised when he did not have any. He is way too innocent, even in his own POV, when in fact he was all aware and planned all of it.
Another thing is that I couldn't fully discern why Theo would not understand the Alcestis a bit after Diomedes gave some of his interpretation about it because Theo himself knew the feeling of betrayal, had even fantasies of killing Gabriel, and went cruel with Alicia, who has nothing to do with him (it was Gabriel who has sin). He was there at the crime scene, he started it. He had watched Alicia, and yet he needs to know the story about Alicia's father to understand why Alicia shot Gabriel much more with Alcestis, and he himself dared to ask who would live between the two of them. Theo was aware of his thinking; all of the answers about why Kathy had betrayed her, why he behaved or felt whatever he felt, yet he couldn't understand Alicia even a bit? And Theo is also smart so it does not make sense to me.