Another possible theme could be loyalty within the family. The family secret could put the loyalty of family members to the test. For example, some members might want to keep the secret hidden while others think it should be revealed, which could create conflict and show different levels of loyalty among them.
Survival. The family has to figure out how to live on the deserted island, like finding food, building shelter, and protecting themselves from wild animals.
It might include an older family member like a grandparent who has been holding onto the secret for a long time. And there could also be siblings who react differently to the discovery of the secret. One sibling might be more curious and eager to uncover it, while the other might be afraid of what the secret could mean for the family.
The mystery and suspense around the family secret usually keep readers hooked. Also, the vivid illustrations help bring the story to life.
Not having read 'Secret Sanction A Novel', I can only speculate. It could be centered around secrecy and the implications of sanctions in a particular setting. Maybe it's set in a political or corporate world where there are underhanded deals and the main character has to deal with the fallout of these secret sanctions. It could also be a moral exploration of when and why sanctions are kept secret and what that means for the individuals involved.
I'm not sure specifically as I don't know which 'the secret novel book' you're referring to. It could be about mystery, love, adventure or many other themes.
The main theme might be about secrets that are intense or 'burning' in nature, perhaps secrets that are so powerful they have a major impact on the characters' lives, like secrets related to love, betrayal or family issues.
Since it's a 'royal secret' novel, one possible main theme could be loyalty. Maybe there are characters within the royal court who are torn between loyalty to the family and loyalty to the truth. There could also be themes of love and sacrifice, where characters have to make difficult choices because of the royal secrets. For example, a character might have to sacrifice their own happiness to protect the royal family's secret, or their love for someone might be put at risk because of the secrets that are starting to surface.
The main theme might revolve around self - discovery as well. The 'secret' could be something within the characters themselves that they are not aware of at first. As the story progresses, they gradually uncover this secret which could be related to their true identity, their desires, or their purpose in life. This discovery then drives the plot forward and affects their relationships with other characters in the novel.
It could be about a hidden love. Secret romances are a common theme in many novels, where characters keep their feelings hidden from others for various reasons.
I'm not sure as I haven't read it. But from the title, it might be related to the concept of sobriety, perhaps exploring the journey of someone becoming sober, either from substances or other addictions.