To Wake the Dead — Richard Laymon

Barney is the first to make the shocking discovery that the mummy's coffin has been broken open. But he doesn't have a chance to do anything about it. Amara is once again freed from the cramped confines of her coffin, free to walk the earth, free to stalk her prey. Free to kill. Nothing can satisfy her bloodlust. And no one can stop her. You cannot kill what is already dead.