The Champion: Contender Book 3

In Taran Matharu's The Champion, the explosive final book in the Contender trilogy, Cade and his friends wage the ultimate battle for their lives--and the fate of Earth itself--in the Game set by the cruel and mysterious Pantheon... Cade has managed to survive the duel with the Hydra Alpha--barely. But the Games are far from over. By order of their cruel and mysterious overlord, Abaddon, Cade and his friends are sent off to war against the Greys, a humanoid race who have far surpassed humans in technology on their home planet. This attempt to move up the leaderboard, however, leads Cade to a game-changing revelation: The Pantheon--the millennia-old alien masterminds behind the Games--have a weakness. With the right artifacts scavenged from the land of Acies and a heavy dose of courage and luck, Cade has exactly one chance to end their tyranny forever. But if he fails, the lives of his friends--and the survival of Earth itself--will be forfeit.