AGE RATINGS: Six of Crows: Generally rated at 12+ but I would recommend 13+ Deltora Quest: 8 to 14 (or up, no one's going to judge you if your an adult and you read these, they're great books) Killing Sound: 14+ Powerless: 13+ with some suggesting 14+ (Possibly even 15+)
Thank you to all the authors of these amazing books
