I dunno... it left room for the possibility of revisiting these places, these characters, but all three volumes were completed in 2019 so it doesn't feel like an ongoing series.
If I'm to take the three volumes as a finished arc, it seem like a rushed, not totally satisfying, ending.
Also, as much as there were some monster-y bits in the previous couple of volumes, there was a pretty gruesome moment in this one I wasn't expecting. To each their own yuck level, but I'm not sure I'd recommend this to younger teens.
I'll have to poke around John Allison's other work, see if these uniquely weird vibes show up again.