First of all, I love this cover art. Absolutely stunning.
The book itself lured me in because it begins on my favorite stretch of the Wonderland: Indian Bar to Summerland. And there were times I was so impressed by the accurate details about the locations! I have spent many happy days on "the mountain," as we say here, and completed two thru-hikes of the Wonderland Trail, so the accuracy made me so happy! Unfortunately, this also made the few errors more glaring to me, but those can be forgiven and wouldn't be noticeable to a general audience.
While this book has an intriguing premise, and there are parts of it so well done, I did find that the first-person narrative didn't always seem to fit the story the author wanted to tell, so our MC had to have insights into some things that didn't quite seem reasonable, so the writing felt a little awkward in places.
The book is a bit darker than I normally enjoy, but that is purely a personal preference. I did think that some characters and plot points could have been developed a little more fully. The ending left me with a lot of unanswered questions. That might have been intentional, but I would have preferred a more wrapped-up ending.
I liked the role Su Jin played in the story, and I liked the character of Ford. I would have loved to have spent more time with Beth. Would I read more by this author? I would definitely give it a try if the topic intrigued me.