Children of Luna (Confessions of Shines & Shades) by Curtis Carter

It was just another day on a world that didn't want them. Just another day of lining up, another day of counts, another day trying to meet quota... Until it wasn't. Things couldn't get any worse, until they did. By the end of that day an ordinary man is put in prison for displaying a dangerous power. His mind would be tortured by the mysteries of that day for years, while his body was subjected to the same by a sadistic scientist hoping to unlock the secret of Nahum Elko's power. And then one day, with the help of a swarthy, mustached mercenary named Turk Cochran, the two men escape prison and go in search of Nahum's long-lost twin, Naomi. The journey will take them across a whole new world for Nahum, a world believed to be dead in the centuries since "The Flight" of his people, the Elkosh. Along the way Nahum will fall into a middle of a war that isn't his and where it's not so clear which side to take. He will have to decide between family and friends, and whether the mission he began is what should be his ultimate pursuit.