I recently reread this favorite of mine. My copy is an old, worn paperback I purchased at a used bookstore in the middle of nowhere in Georgia. The cover art shows the two man characters Hugh and Irena lost wandering in a forest, Hugh dressed in the vest from Tembreabrezi with the ceremonial sword drawn, and Irena in the red traveling cloak the inn lent her. I've seen other covers for the book, and this one blows the others away. It is apparently also the author's favorite, because it's the one she shows on her website.
This book, especially with this cover, might make you think this story is in the same genre as Narnia or Bridge to Terabithia. It is and it isn't. For one, this book is not meant for children. It's actually too mature for young adult. It'd be better for students just entering college.
If you recently read this book and are trying to understand it, or read it long ago but didn't really get it or don't remember much, I'm going to offer an explanation for the story that should help it make more sense. (Spoilers below)
To enjoy this book, you need to understand that it is not the same kind of book as Narnia.