Books in the Zombie Chasers series

Zombies Take Manhattan!Six months after Zack Clarke, his sister, Zoe, and pals Rice, Madison, and Ozzie saved the country from brain-gobbling ghouls, things are finally getting back to normal.The Romero Middle School kids are visiting New York City on a class trip, but their tour of the Big Apple goes from sublime to slime when millions of people mysteriously rezombify!The Zombie Chasers are back on undead duty, but can they escape the crowded city streets and find a new cure? Or is Z-Day here to stay?