I enjoyed this. It felt like an original world-setting, it was nice to encounter a fantasy world that didn't lean on well established tropes. I want to learn more about the world, so I'll probably read the other 2 books at some point. The story was quite... limited? Felt like a short story more than a full novel. Not that it felt like it was dragged out, but just that it was a very simple plot.
But that makes way for good themes, setting, and the development of the main character. LeGuin packs in a sense of time passing and emotional maturing to this short novel. There's a tender and realistic demonstration of what loss of hitherto-unshakable faith is like, and mixed into that a critique of dogma and religion as well. It's nice to see deeper themes like this in YA fiction.
As well as being, to a lesser extent, a journey of events, people, and places, it's also an emotional journey from darkness into light, with Tenar ending up a very different person at the end; less sure of herself, wounded by her past, but free and more whole. One thing I really love to see is complex, flawed characters, and Tenar feels real and alive in this book. It's my first time reading LeGuin, but I can tell already they have a way of capturing the human spirit, and I look forward to exploring more of their work.