I enjoyed this one almost as much as I enjoyed the previous two, but for different reasons. 
 Surprisingly, I enjoyed it for none of the reasons that I was expecting. Firstly, I enjoy not just symbolism but the symbols themselves. They weren't just blazoning on the page, after all, they were blazoning in my mind. None of it was particularly complicated or ominous, just relevant to the tale in both the obvious ways and the not so obvious ways. I tried looking at the books from the point of view of the symbols, and the tales become as crisp as Christmas Morning. It is really quite nice to have new fiction that can turn alchemy into alchemy. 
 Secondly, I enjoy themes that speak to the heart of the world and why we're living in it without becoming some broken down biological soup or a bunch of creatures standing around holding hands and singing "we are the world". Sure, a little bit of both happens in the novel, but I noticed something. Life goes on. Life always goes on. The goddess Diana or Artemis always knew this. It's not about hunting or justice, after all. It's also about Apollo who's notoriously absent from all three novels except from the pages of of the alchemy. Life goes on. There's no conflict between the gods. There's no tension, and indeed, there never was. Brother and Sister were twins, after all. 
 Sister night was one of the main characters across the trilogy, from within Diana and her being a chimera, to the entrance of the goddess herself, to the overwhelming overabundance of female witches except for her father and Peter, to the title of the second book, to the arrow at the end. Nothing was as simple as a direct one-to-one correlation, here. It was the deeper themes that really sparked my imagination. 
 That, and the novel also happened to be a fun urban fantasy romp. The issues at hand were on a deeper level than the action, and although there was a little action and a little romance thrown in, they were all in service to a greater power and not gratuitous. 
 All said, I am very impressed. Thank you!