Well, themes in the 'Dark Princess' novel could include love and betrayal. Maybe she falls in love with someone she shouldn't, or she is betrayed by someone close to her. Also, redemption could be a theme. If she has done something wrong or has a 'dark' past, she might be on a journey to redeem herself.
Power could be a main theme. The dark princess might be involved in a struggle for power, either within her own realm or against external forces.
One common theme is power struggle. The dark princess often has to fight for her power, either against a corrupt regime in her own kingdom or against external forces that want to control her. For example, in some novels, she may have to battle her own family members who are trying to usurp her throne.
One possible theme could be the connection between the princess and the animals. Maybe she has the ability to communicate with them.
Well, it's hard to be certain without reading the 'a grin in the dark novel' but based on the title, themes of mystery and suspense are likely. The 'grin in the dark' gives an air of something hidden, waiting to be discovered. There might also be themes related to the power of the imagination. When we're in the dark, our minds often create all sorts of scenarios, and perhaps the novel plays on that, making the characters (and the readers) imagine the worst. Also, it could touch on themes of survival, if the characters are facing whatever is behind that grin in the dark.
Another theme could be redemption. Maybe the events on this 'Dark Saturday' lead the characters to seek redemption for past mistakes. It could be a journey of self - improvement and making amends for things they've done wrong.
One possible theme could be fear. The very idea of a dark house often evokes a sense of unease and terror. Another theme might be mystery. There could be secrets hidden within the walls of the house that the characters are trying to uncover. For example, the mystery of what happened to the previous owners or what lurks in the attic.
One possible theme could be fear. The darkness of the room can symbolize the unknown, which often induces fear in people.
Isolation could be a theme. A dark tale might be set in a desolate place or the characters might be isolated in some way, which adds to the overall sense of gloom. Also, the theme of loss can be present. This could be the loss of a loved one, of innocence, or of hope, all of which contribute to the darkness of the story. For example, in a story where a character has lost their family in a tragic event, it sets a very dark mood.
Another theme might be isolation. At night, especially if it's very dark, a person can feel alone and cut off from the rest of the world. This sense of isolation can be a strong theme in the story.
Isolation could be a theme. In the dark, one can feel very alone. If it's a story about a person in a dark place, they might be cut off from others and have to deal with their situation by themselves. Also, survival can be a theme. If the 'in the dark' situation is dangerous, like in a dark cave full of hazards, the characters would be focused on surviving.