I'm not sure specifically as I haven't read the 'out of darkness novel' in detail. But usually, in a novel with such a title, there could be a protagonist who is the one trying to get 'out of darkness'. This character might be a young person facing some sort of internal or external struggles.
Redemption could also be a theme. If the characters are in a 'dark' place, perhaps they are seeking to redeem themselves, to move from a state of guilt, sin or despair to a better, more positive state, and this journey could be what the novel is about.
The main theme could be about hope. It often shows how characters find their way out of difficult or dark situations, which implies that there is always hope even in the toughest times.
Often, there will be some sort of antagonist or opposing force. It could be an internal force within the main character, like their own negative thoughts or habits. Or it could be an external factor, such as a difficult person in their life, a harsh social environment, or a challenging situation that they need to overcome in order to get 'out of the darkness'.
It could be about a journey from a difficult or dark situation towards a more positive or enlightened state. Maybe it's a story of a character who overcomes personal hardships and emerges with new hope or understanding, like many novels in the bildungsroman genre.
It could be centered around survival. Turtledove is known for creating detailed worlds where characters face various challenges. In 'Out of the Darkness', perhaps the characters are striving to survive in a world filled with obstacles, and their journey of survival is what the novel is mainly about.
I'm not entirely sure as I haven't read the specific novel. But in Turtledove's works, he often has a diverse set of characters. There might be a protagonist who is leading the journey out of the darkness. It could be a regular person who finds themselves in extraordinary circumstances.
The story 'The Darkness Out There' by Penelope Lively is a thought - provoking piece. It often explores themes of perception, the unknown, and the duality of human nature. For example, the setting in the story, which may seem ordinary at first, gradually reveals hidden depths and a sense of unease as the plot unfolds.
Perhaps there is a wise old character who serves as a guide in the face of the darkness. And there might be a villainous character who is somehow associated with the source of the darkness. It's common in stories for there to be a contrast between different types of characters in relation to a central concept like the darkness in this story.
Well, the story might deal with the theme of discovery. The darkness out there is like an unexplored territory, and as the story unfolds, characters may discover things about themselves or the world around them. Also, it could touch on the theme of survival. If the darkness represents danger, then the characters need to find ways to survive in such a threatening environment.