Tami Veldura 
The Call Of The Grim [EPUB ebook] 

Nariah is in high school, plays tennis, is learning how to navigate friendships, and hunts zombies. In every graveyard, a large black dog, a Grim, is buried to protect the dead. But when the dead rise, the Grim rises with them to protect the living. And when the Grim rises, Nariah goes to work. If her mom says it's ok, that is.