I really enjoyed this short story, but I'm not really sure who it was written for. The synopsis says grades 3-5, but it contains pretty heavy themes for 3rd graders in my opinion. The book has people getting burned to death, a father who secretly resents his daughter because his wife died giving birth to her, and some of the illustrations are a bit gruesome. But then it's too short a book for slightly older kids. 
 I would recommend it for adult fans of GoT; it's a nice short entertaining read from GRRM. I liked Adara's character and the idea that she is a winter child and doesn't feel the cold, and her realization of what is really important to her at the end was a nice bit of character development, despite the shortness of the story.