The combat codes

"In a world long ago ravaged by war, the nations have sworn an armistice never to use weapons of mass destruction again. Instead, highly skilled warriors known as Grievar Knights represent their nations' interests in brutal hand-to-hand combat. Murray Pearson was once a famed Knight, until he suffered a loss that wounded his homeland--but now he's on the hunt to discover the next champion. In ruthless underground combat rings, Cego is making a name for himself. Murray believes Cego has what it takes to thrive in the world's most prestigious combat academy--but first, Cego must prove himself in the vicious arenas of the underworld. And survival isn't guaranteed"--Provided by publisher.