this was a great sequel to the Brave movie but also was so clearly trying to hit the 'Rise of the Brave Tangled Dragons' fandom back in the day lol. I think the boy in this is very Jack Frost-coded, he's not a winter ice god but he is a forgotten boy god who struggles with his task and loneliness. 
The story is a bit slow at times but the ending was wonderful. I love Maggie Stiefvater's writing.