I really have no idea how to review this book. It's in the middle of the series and nothing is truly resolved. Some relationships are in better places at the end of the book than they were at the beginning, but the resolution wasn't there. Not really.
I am tackling this series to get to the Glass Series, and Magic Study is where we're introduced to Opal. Not much, but at least I got the backstory I had been looking for before beginning Storm Glass. And I'm quite excited to finish this series and start the next because I've enjoyed the characters and writing so much.
The plot is interesting, though I'm not sure where it's going. The characters really hit the mark for me, though. They are all flawed, some irreparably so. But they are all engaging. And the world building isn't bogged down with details we really don't need. Great story so far, let's finish this!