Sludgment Day (Zombie Chasers)

For use in schools and libraries only. After three days of fending off an unrelenting mob of brain-munching fiends, Zack and his friends now have an even bigger problem on their tails! They are not going to let their hard-fought zombie antidote land in the wrong hands. He's got a plan to defeat the undead and find the evil genius behind the zombie apocalypse, even if they have to travel cross-country to do it.