Beyond Burning Sands - Burning Sands, #3

The deadliest hunter is human. Reggie Lee has survived the nightmarish, genetically engineered horrors of Cro-Magnons and sharpteeth that ruled the ruins of Las Vegas. Now he must face the greatest threat of all: another human. Snake is a former rival from the world before the cataclysm, and he has declared war on all other humans. To survive, Reggie must find more answers, because fighting Snake will require a strength Reggie might not have.
But if he can't stop Snake, humanity truly is doomed. Read book three of this horrifying post-apocalyptic series and see if you can go Beyond Burning Sands.