Sky Song was a bit of a disappointment for me. Admittedly I bought it because of the cover, and it is a children’s book (“middle grade” as it’s called now).
My main problem was an the antagonist who was a cookie cut snow queen without a story. Her backstory is delivered in a prologue which instead of setting the scene, used a style completely different to the story so it felt disconnected to the character.
Eska, one of the protagonists was a good character in that she showed courage, bravery and resilience, but her co-protagonist Flint was incredibly predictable.
The world building, prologue aside, was interesting, but not developed enough for an adult reader. While the story was generally predictable.
On the whole, I wasn’t the target audience for the book, but as someone who often enjoys children’s fiction I found this lacking.