Steelheart by Brandon Sanderson

The Epics are people who have been gifted with incredible superpowers, but they don't use them for good. Instead, they use them to rule the human race and do as they please. They are too strong to fight against, but a small group of ordinary humans called the Reckoners use their intelligence to study the Epics and find their weaknesses so they can kill them. David is determined to find and join the Reckoners so he can finally get his revenge on the man who killed his father ten years ago: Steelheart, the one Epic said to be invincible.