Lorela: Dog Warriors: Fourth Book of Devastation

Lorela is a red planet…a dead planet! For several hundred years, the human colony of Lorela was thought to have been wiped out but they survived deep underground, out of sight of those who would use them. The lucky ones made it to the mines, locked in away from the harmful radiation. The unfortunate ones wept, surviving as best they could. Over time, the humans that were left breathing in polluted fetid air began to mutate. As the generations passed, all they knew were howls in the dark and the taste of flesh, bitten from that of those who howled with them.
Memphis Grimm was the first to step out to view a tortured landscape; his pack hounded by those who would consume them. Pack Grimm raced across the barren landscape, in search of sanctuary, freedom from the pack lands and a place they could call their own. None could have known how far this journey would take them, not even those who watched from a distance--far across the galaxy, amused at what crawled out from the darkness.