Survival is a major theme. The boy and sometimes the dad have to figure out how to get food, water, and shelter in the harsh wilderness environment. For example, in 'Hatchet', the boy has to learn quickly how to make a fire to keep warm.
Another good option might be 'The River' which is a sequel to 'Hatchet'. The boy continues his adventures in the wilderness, and his past experiences with his dad, the lessons he learned from him, might be reflected in how he tackles new challenges in this book.
One common theme is acceptance. The stepdaughter has to accept the new father figure in her life, and the dad has to accept her as part of his new family. For example, in many stories, the stepdaughter may be initially resistant to the dad's presence, but over time, they learn to accept each other.
Love is a very common theme. It can be first love, unrequited love or a deep, long - lasting love. For example, in many stories, the boy and girl meet and gradually fall in love, like in 'Romeo and Juliet' where their love is intense but also tragic.
Love is a very common theme. It could be the initial attraction, the process of falling in love, and the challenges they face together.
Another common theme is growing up. As the boy and girl interact, they often grow and change. In 'To All the Boys I've Loved Before', Lara Jean goes through a lot of personal growth while dealing with her relationships with boys. Her experiences shape her into a more confident girl.
One common theme is bullying. Often in these stories, a wedgie is used as a form of bullying, showing the power dynamics between kids at school.
Another theme might be growth. Aster could be growing up and learning from his dad's experiences, or his dad could be changing and adapting to Aster's development. It could also involve themes of protection, with the dad protecting Aster from various threats or challenges in the fictional world. Additionally, discovery of self - identity within the family context can also be a common theme as Aster figures out who he is in relation to his dad.
In 'naruto is a dad fanfiction', a common theme is the exploration of father - son/daughter relationships. Naruto tries to be the father he never had. There's also the theme of adapting to a new role. He's used to being a hero, but being a dad requires different skills. And the theme of family unity, where the family comes together to face various challenges in the ninja world.
In 'dad for one fanfic', a frequent theme is the redefinition of family. With the 'dad for one' scenario, the idea of what a family is gets challenged and reshaped. This can lead to themes related to loyalty as well. Characters may have to decide where their loyalties lie within this new family dynamic. There can also be themes of sacrifice, as the 'dad for one' character might have to give up certain things to fit into their new role in the family.
One common theme is the transition from being a hero to a father. Percy has to balance his old life of adventure with his new responsibilities. Another theme is the passing on of his skills and values. For example, teaching his kids how to swim or be brave like he was in his adventures.