To Sleep in a Sea of Stars
This book was written after years of Paolini writing The Inheritance Cycle series. After this, he felt that he creatively needed to try something new. As such, this book symbolizes the author's venture into sci-fi and a new kind of adventure novel.
Implants
In this novel, people don't have phones, and instead have implants. This represents Paolini's attention to detail and his convincing vision of the world in 2257.
Soft blade
Soft blade represents the threat of getting involved with other life forms. The humans in this novel can't begin to understand the threat they are faced with, which represents the danger of humanity transgressing into the unknown.
Technology
Technology is a key motif of this text and is something that Paolini researched for many years. It is incredibly believable that this novel is set in 2257, due to the convincing use of technology, which affects every area of life.