Kelly Lyn I. Kelly 
Dark Lands: Requiem [EPUB ebook] 

Webb Thompson awakes, disoriented and fearful. He sees green grass and a black, boiling sky spread out before him. He finds his little sister nearby, unconscious. When he reaches her side, Sundown is alive. But now they have other problems: where are they, how did they get there, and what is that growling noise? Webb and Sundown have awakened in the Dark Lands-a world between life and death where sacred souls battle malevolent evil for control of the living realm, a battle of which mere mortals know nothing. How did Webb and Sundown come to this place? Are they living? Are they dead? Or are they something else?