Zodiac is a trilogy written by Inferno999.
Jake lives in a society where your whole life depends on the day you were born, and the constellation you were born under. His parents, his teachers, everyone in his village is a Cancer. As a Capricorn, he's ostracized from the rest of the public. When Jake turns thirteen he's forced to live with other Capricorns, and learn their ways. Their asking why the world became like this, and they're getting closer to the answer. Jake regrets being born on January 10.