I had the book recommended to me by a few friends. It was a decent book, but the more it went on, the more it fell short. It's an intriguing mystery, but kind of low stakes. It loses what made it interesting about halfway through. Also a few more spoilery problems I have:
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I don't get why the main character is so invested in the mystery after a certain point. It's just curiosity.
The mystery of who Fermin is just dissolves away.
EVERY female in the book is beaten, killed, raped, impregnated, imprisoned or enslaved in some way.
The mystery is resolved in a 60 page section that just explains everything which, to me, isn't satisfying.
I don't believe the love between Daniel and Bea. It just suddenly begins and apparently lasts.
After nine months of locking his daughter away, Senor Aldaya still isn't over it and leaves her to die in there? Excessive even for this world.
Any black/white characters are just portrayed as one or the other. Julian becomes a tragic hero despite being a monster. Fumero is just a monster.
The mirror between Daniel and Julian doesn't really amount to anything and is pretty coincidental.
I probably have more issues, but can't remember them. It's like a worse Archimboldi story from 2666.