Sludgement Day by John Kloepfer
The maul of America! It's been two days since a zombie virus turned Zack Clarke's parents, neighbors, and most of the country into brain-munching fiends. Zack and his crew of Zombie Chasers-Rice, Madison, Ozzie, and Zoe-are ready to end this nightmare once and for all! With the antidote in hand, the gang sets off on a wild cross-country road trip to defeat the evil genius behind the zombie apocalypse. After battling undead Elvis in Memphis, ghoulish tourists at a rest stop, and a crew of zweenyboppers at the Mall of America, the Zombie Chasers are still only halfway there! Will Sludgment Day be the dawn of the dead?