The Unwanteds by Lisa McMann

Thirteen year old Alex is declared an "Unwanted" while his twin Aaron is declared a "Wanted" in the land called Quill. Alex is taken away to the area where death awaits, but unknown to everyone is a magical kingdom called Artime where the Unwanteds go. The Unwanteds get to unleash their creativity and enjoy life, but Alex still wishes his twin could be with him. The Wanted society is drab and any individualism is discouraged. Alex does the unspeakable and reveals Artime to his brother which unleashes the ultimate magical battle. This is for middle grade readers and involves non-stop action, magic and secrets. I couldn't stop reading.  Ann