The Lab — Jack Heath

YOU CAN'T KILL THE PAST.
Meet a sixteen-year-old superhuman: Agent Six of Hearts. He's the strongest, most effective agent in the Deck, a team of special agents fighting to uphold justice in a completely corrupt world.

Six would be invincible ... if not for a deadly secret. He's the product of an illegal experiment by the Lab -- a ruthless division of the corporation that controls his world. When the Deck begins to investigate the Lab, Six walks a tightrope between his two worlds, trying to keep his origin secret. But then he meets Kyntak, a boy whose past equals his own. As Six's life spirals out of control, he must face his most dangerous mission yet.