STEELHEART, by Brandon Sanderson

The story: David has spent his life seeking revenge against Steelheart, the Epic (a being with super-human powers) who murdered his father. The teen has the knowledge to infiltrate The Reckoners, a top-secret group whose agenda has only one item: overthrow Steelheart and any other Epic they can find. Although their agendas are the same, each member of the team has secrets--secrets that make them stronger individually, but which could lead to the defeat of everything they're working for. But David has crucial information no other Reckoner has ever known: he's seen Steelheart bleed. He knows the Epic can be brought down somehow, and David wants in.