Fortunately, we are exposed to less interaction between Mac and Barrons in this book. The worldbuilding is still interesting and we meet some promising NPCs, but for a book this long, nothing of much impact happens. It's just random events, hunting for McGuffins to find the big bad McGuffin, Mac is still stupid and exactly like any other urban fantasy heroine, despite several reviews promising me she wouldn't be (but don't worry, she'll ramble on about how much she's grown and how tough she's now endlessly in her inner monologue - she just won't show it in her actions), the male characters are still annoyingly lewd in the stupidest of situations and Barrons is still abusive, despite serveral reviews promising me they wouldn't be.
Mac and Barrons still annoyingly do not communicate information for the simple reason to put more pages in this book. 

Also, how tf are the Shide-Seers hiding in that abbey when there are 700 of them in this one place? That's, like, half the population of Ireland!