The Unkillables (Unabridged‪)‬

Zombies versus cavemen: Gash-Eye already thought life was hard as the Neanderthal slave to a band of Cro-Magnons. Then zombies attacked, wiping out nearly everyone she knows and separating her from the Jaw, her half-breed son. Now she fights to keep the last remnants of her former captors alive. Meanwhile, the Jaw and his father try to survive as they maneuver the zombie-infested landscape alongside time travelers from 30,000 years in the future.