The Rotting Room

The Rotting Room by Viggy Parr Hampton was a wild ride of unreliable narration, religious trauma, and evil nuns (not to mention a little gothic vibe with the creepy nunnery and the damsel in distress), and I couldn't put it down. 
It's Spain, sometime in the 1600s - there's some authentic history here, because that's how Viggy Parr Hampton rolls - and Sister Rafaela has been sent to a new convent because some crazy stuff went down at her previous one.  What exactly that was is a bit of a mystery and depends on how reliable we think Rafaela is vs. how much is being covered up by the church, but that's kind of a non-starter, fact-wise;  it definitely involved the death of a small boy.
Things are kind of normal, if a bit creepy, at first. They have a vow of silence so they can only speak for one designated hour a day,  and,  they have a room where they put the bodies of deceased nuns to allow them to decay (the "rotting room") and where, by TOTAL COINCIDENCE, they concoct a liquid tincture which they bottle and sell to the villagers because it "erases sin". 
Before Rafaela even settles in, they get a visitor called Berta who claims to have come from a convent in England, who is very sick, so they take her in. She dies pretty much immediately and is taken to the rotting room, and, this is when things really go off the rails.
Bodies start piling up, we learn about Rafaela's childhood trauma, there's a priest who's hot for her (and full of his own childhood trauma - but still quick to totally not believe her when she says something's not right with the abbey), and the potentially evil, is she a saint or is she the undead?, Berta.
There's a lot going on in The Rotting Room (and in the rotting room), but there's also plenty of time spent in the minds of the narrators - both Rafaela and lusty Father Bruno - to keep us connected to the story through their eyes (however unreliable those eyes may be). I received an advance review copy for free, and I am leaving this review voluntarily.