Hollowland (The Hollows #1‪)‬

"This is the way the world ends - not with a bang or a whimper, but with zombies breaking down the back door."

Nineteen-year-old Remy King is on a mission to get across the wasteland left of America, and nothing will stand in her way - not violent marauders, a spoiled rock star, or an army of flesh-eating zombies.