The Great Beast (a zodiac book)

Leo is the king now, he didn't want the throne so soon, he just wanted to live out his young life for awhile, finally responsibility was put upon him, the responsibility of protecting the lives of thousands of people. He doesn't like to take things seriously until it's finally a problem. The Great beast has been ravaging innocent townspeople, it only comes out at night, and once a month to fill its belly. Leo decides to hold a competition and the winner can claim their rewards.