Vespertine by Barnaby Rogerson

Set against the backdrop of a world where the divine and the mortal realms intertwine, this tale follows a young nun who becomes the unlikely bearer of a powerful, ancient spirit. As she grapples with the immense responsibility and the dark forces that threaten her world, she must navigate a labyrinth of secrets, alliances, and betrayals. Her journey is one of self-discovery, courage, and the relentless pursuit of truth, as she learns to harness the spirit's power to protect her people from an impending doom.