From Darkness Born — L.L. Nelson

Twisted by power and driven by hate, a madman unleashes an ancient force on an unsuspecting world. Hundreds die at his hands while scores are transformed into walking nightmares. As the carnage unfolds, an outsider sets forth, with a group of warriors, to end it. To do so will take them into dangerous lands, filled with nightmarish creatures. But, they know that failure will plunge the world into darkness.