A Reckoner trilogy: Steelheart, Firefight, Calamity

The Reckoners is a trilogy of young adult superhero novels written by American author Brandon Sanderson. The series consists of Steelheart (2013), Firefight (2015), and Calamity (2016). The series depicts a post-apocalyptic world in which the appearance of an orbiting cosmic entity known as Calamity has given random people superhuman powers in apparent defiance of known physical laws, turning them into "Epics". These powers have impelled most of them to prey upon or enslave the rest of humanity, causing the collapse of traditional governments. One young man orphaned by a High Epic joins a group that is killing Epics.