I love these and I desperately need to a do an audio reread the next time I feel like the world is very on fire and new books are unimaginable. (So like...Thursday?)
McGuire continues to do a fantastic job with the pendulum nature of these stories that swing back and forth between the children at the school and their backstories and she's just really good at reminding you what happened despite encountering them once a year or so. 
It was around...three books ago that I started REALLY getting the sense that there's an arc and, while she *could* keep writing, she has a specific place she wants to get them to reach and that's making it even more interesting.
Escape. Recovery. Consolation. McGuire gets it.