This book is disorientating because it insists on being whimsical. There is nothing inherently wrong with being whimsical, but it's hard to get a lock on the world here and how it works. You need to keep sticking with the book to get an understanding of how the world works, how magic works and what on earth is going on with the bad guys and even where the good guys might be. There are ominous characters that don't seem to fit, but add to the bleakness and slightly adversarial tone of the book. They might be developed in subsequent books. Getting a visual image of the world is also hard: it seems like our world, yet utterly unlike it, such that it is hard to follow the imaginings of the author.
I liked it, though. There are some great characters, aside from the main character (Sam), through whose eyes we see a lot of the main action. He is trying to figure out the world, and the people in it, and how he fits and what he should do. It's all coming-of-age type stuff, but on a massive scale, which really captures how it feels at the time. Even trying to figure out the other characters is tough for Sam, whose experience of life is so limited, but like most adolescents, he really needs to understand who others are and whether to trust them. This is really difficult for Sam. So, one of the key characters who dies as the story opens, seems to look like a bully at the beginning, but is by the end of the book much more sympathetic. The opposite also happens: helpful characters are revealed to be dodgy as the book unfolds.
There are a lot of extra characters who feel like they'll rejoin the story later, but that may also be an attempt to imitate life: people we grow attached to leave and because we are attached to them we expect to see them again, but we don't always.
The big bad is defeated, but again, it's multi-layered and existentially hard to enjoy. And the big bad really is bad: there is torture, to which we are privy, at least for a few pages.
It's really complex, trying to do so much, with so many huge themes.
In terms of plot, I'd be hard-pressed to retell this. It feels like a roller coaster, with a lot happening and the significance of what is happening seems to unravel slowly, so that it's hard to really see the significance of what is taking place as it happens. It isn't a surprise to discover this author is influenced by le Guin, as it has that same 'feel'.
This would take a bit more maturity to read and stick with, and would need a bit of debriefing. It's not a safe, easy world, and is complex and difficult in ways that don't always ring true of this world. That's not necessarily a weakness. It is worth mentioning though as the book is dealing with issues which do make our world a hard place to live. The resolutions, and even the descriptions aren't necessarily a good model to use to think about living in a hard world.
Having said all of that, and it is clear that I did feel frustrated by this book, I would recommend it. It's interesting, compelling, challenging (both as narrative and in terms of some of the issues it tackles) and thought provoking. It isn't gritty as a lot are in this genre, but is more well-rounded, and raises issues in ways that are genuinely thought provoking, rather than the hackney-ed emo type scrawl that gets a bit old. Life is hard, but is also more than just hard, and that is difficult to capture. This book does a good job of that.