Amber Smoke (Escaped series, Book 1) info
There is a world that runs parallel to our own, a world in which the souls of the damned are caged, where they are looked over by the Furies, and where they spend eternity in torment. Someone has opened the cage. The worst of terrors have crossed the barrier that separates our world from theirs, and the Furies send their only son, Alek, to try to bring those souls back. But he won't be able to do it alone. Eva has grown up surrounded by secrets. First, she will be hunted in an ancient feud that will threaten her life. Then, she will become the hunter. With two worlds on the verge of crumbling around them, Alek and Eva must work together to save everything they hold dear.