The Unwanteds by Lisa McMann
In Quill, only the best thinkers are allowed to live. Any one showing signs of weakness, or creativity, or imagination is eliminated. But they are not. Instead of being terminated, Alex finds himself in the secret world of Artime. Can he adapt to his new home, or will missing his twin lead him down a path that might be the end of Artime, and maybe even the deaths of his new friends.
Liked this! And the cover says it all...Hunger Games meets Harry Potter. If a parent is a little weary of their kiddos reading Hunger Games, this would be a good alternative.