Raybearer, Jordan Ifueko. This was terrific. Perfectly paced, interesting worldbuilding, there's a bunch of world info and backstory to convey but it's always really smoothly fit into the narrative, the main character has a compelling arc, Stuff Happens including a heck of a climax that makes me eager to read the next one - the only reason I'm not instantly giving it my first place vote for the Lodestar is that I also really liked Cemetery Boys and Elatsoe and now there will be the pain of unavoidable ranking. But anyways if you like YA fantasy this is the good stuff. The cover is also *gorgeous*; I ended up reading it on my phone despite having a friend's paper copy because that way I had it in my pocket at random times, but if you like the-book-as-object this is a nice object.