I am not really sure I understand what's going on especially the alchemy part of it *lol*. But one thing for sure, CREEPY town is CREEPY!! There was a claustrophobic sense to the town, and I had the shivers when it was dealing with the freaky corpses *urgh*. I swear, the whole calcification part of the corpses CREPT ME OUT!! The Hanged Man myth was good and unique; not sure I ever encountered that before.
This one feels good enough as stand-alone. I mean, I saw that the series continued, but much as I liked Petra and her coyote, this felt more like supernatural horror rather than urban fantasy. So I'm not picking up the next book because it is not exactly what I am expecting.