The Labyrinth of the Dead — Sara M. Harvey

"Imogen is all that matters. After rescuing her lover from the forces that trapped her in The Convent of the Pure, Portia Gyony has lost Imogen once again to the darkness that surrounds them. The only way to reunite is to walk through the shadow-worlds of the dead and bring Imogen back to the body that awaits her a journey no nephilim was meant to take. Still seeking out the boundaries of her own power, Portia descends into a realm where all trade is in souls and the machinations of the world itself are coming undone. Her quest for Imogen becomes a battle of angels and demons, where clockwork warriors and shattered souls battle to keep the shadows of the dead from bleeding into the land of the living. The cost of saving one world from the other may be the sacrifice of Portia s lover once again."