I received the audiobook from Netgalley for my honest review.
The narrator is amazing, I've listened to several books shes done and when I heard her voice I actually pumped my fist in the air, I knew instantly this was going to be a book I would enjoy. 
This book starts as a 2 pov then by like ch 5 you get a 3rd pov and it starts to alternate between the three every chapter or so. It threw me off a little bc I thought I missed something but Törzs does this to get to know the sisters a bit better which ultimately works really well. This feels like a which-y version of the Library of Alexandria- magic isn't know by everyone and spell books aren't as easy to come by as other stories have you to believe. Only a specific person can write spell books...in blood. Okay its not that dark of a book but it does have some trauma involving the "scribe". When reading I kept trying to put the 4 main characters in to represent each word in the title, doesn't really work that way. But I think my favorite thing in this book is the Mirror Magic! It is done so well and very cool.