A major theme in this novel is Classism or; Prejudice against or in favor of a certain social class. The theme of classism develops throughout the novel as the three characters. two of which are of high social standing, run away with a a boy from the lowest class in their society. In order to bring down the societal classist system.
"He's stolen company property from his father's private lot; he'd violated the restricted speedway, violated driving regulations." (pg6) Knox is from the upper city son to the owner of Xelon Core which is the company that runs everything. Despite knowing what he's doing is illegal because of the class system his proxy will be punished in his place, he continues to break the law.