Resurgam Trilogy, book 1: Dust
Joan Frances Turner2010

What happens between death and life can change a girl. Jessie is a zombie. And this is her story...

Nine years ago, Jessie was in a car crash and died. After she was buried, she awoke and tore through the earth to arise, reborn, as a zombie. Now Jessie's part of a gang. They fight, hunt, and dance together as one-something humans can never understand. There are darkplaces humans have learned to avoid, lest they run into zombie gangs. But when a mysterious illness threatens the existence of both zombies and humans, Jessie must choose between looking away or staring down the madness-and hanging on to everything she now knows as life...