The Throne of Hades: A ShortBook by Snow Flower

Lynnton Wor watched as the world she loves crumbled around her. The demons are in control and hell bent on destroying it… or so she thought. When a Hadesian Prince appears in her apartment and asks for her help, he tells her a tale that conflicts with all she's ever believed.  He also tells her that he isn't the only one looking for her. Can she break through the pain and training of her past, risking her own future and possibly her heart?