I loved the lore of the kingdom of men living amidst the more ancient dwarfs and "woldwellers." The story itself is charming and rings true to how humans start rumors and get into arguments about small issues, which soon turns out to be bigger concerns. The people Gaylen encounters are interesting and whimsical.
A few minor details do detract me (sorry I'm a detail-oriented person): Gaylen was a tad young to be riding off by himself to do the work of polling the people, through these towns and lands. But I'm sure there are more mature 12-year-olds who can take care of themselves?
Ardis makes her appearance rather late in the story. I found myself wanting to her to appear early on, like maybe halfway. But that probably wouldn't be possible for the plot.
Hemlock is only a mild villain, although he's built up to be worse than he is. He seems like a particularly argumentative and selfish man, but not much else. I would've like to see him more nuanced. I think my view may be tainted by villains who've populated other books that I've read, who are evil, psychopathic, or at least sociopathic.