sunny boy books

In a world where magic is industrialized and technology is fueled by mana, the most brutal competition of the century has begun: The Succession War. Twenty-one Princes and Princesses are locked in a struggle for the throne. To win, each royal must assemble a team of nine "Servants"—an elite force of guards, assassins, and tacticians who will fight their battles in a series of lethal missions and high-stakes games.