I'd have liked this much better if it had been played straight. Instead we got a series of ritual murders that actually postulated that Aztec magic was real, that a Bruja could kill with a word, that divintation of past events in strangers could be guessed by thought transference.
On top of all this, the assassins seemed to be totally invisible, striking their victims without being noticed, even in public or crowded places.
One utterly annoying niggle was the way the type of scandal sheet newspaper Casasola had been demoted to had been translated. They are not "red note" papers but "Red Top" newspapers.
In the meantime, Edith Mondragon, in charge of the cases, must be the stupidest detective in Mexico in her obstinate refusal until far too late to acknowledge that the serial killer was following a set of Aztec omens.
I found it amusing that despite the codex, the fulfillment of the omens, the supposed power of the magic, that after the final sacrifice which was meant to usher in a new era of the old gods, nothing happened. And where did Edith's gun come from seeing as she'd had to hand her own in after being sent onto sick leave?
Too many inconsistencies and gaping holes in the plot. Yes, I finished but it was a grind. I don't recommend this.