I loved Rachel Aaron's DFZ series (and I didn't know there is a new spin-off!!).  This is the first book of The Crystal Calamity series.  I liked that this takes place in an alternate 1866 in the West in Montana.  I loved Mary Good Crow.  The blurb makes it sound like she is the only POV but sadly that wasn't the case and I did not love all of the other viewpoints.  I wish we would have had more of Mary.  I did like Rel who works as security for a brothel and saloon.  I also enjoyed the few chapters from Lucas, an officer with the army.  Unfortunately, I did not really care for Josie and thought her character was extremely unrealistic for both the West and the time period even if I took the magic into account.  Sadly as the book progressed, she took up more and more page time.  The crystal magic was compelling at first and I liked the creepy cave system.  But I was not enamored by the explanations of crystals that we did get and I did not enjoy the ending either.  I also thought at 522 pages it was weirdly long in places and then had a rushed ending.  I don't think I will pick up anymore of this series.  But I shall get the new DFZ series spinoff. Arrr!