This book is the sequel to the Stone Key, so much of my review for that book applies to this one.
My favorite part was when a scholar provided exposition about the world outside Elspeth’s homeland, particularly the hints concerning white-faced lords who maintain an industrial civilization.
The circumstances of my reading this book do not facilitate a fair review. I’ve been sick, doing an intensive research course and it’s been a decade since I read most of the books in the Obernewtyn series. I feel as though half the book consisted of Elspeth worrying about leaving Obernewtyn, the other half a gruelling mountain trek. If you want to read this book, go through all the prequels and wait for a huge gap in your schedule before doing so.