Today teenagers or adolescent are becoming more exposed to a variety of reading materials whether produced by local publishers or international publishers. Most of the novel revolves around the story of young love, friendship, family, school, natural life stories, and not to left behind the investigation theme that had been produced to meet the youth court today. Novels on the investigation theme and sports culture in this discussion will not only have their charm, it's also able to hone young minds to think in depth about current issues and global issues. Two novels analyzed in this article are Detektif Indigo (Detective Indigo)(2004) and Justeru Impian Di Jaring (Therefore Dreams on the Net)(2007). Based on these two novels many aspects of knowledge that can be extracted from this work in shaping adolescent minds. This discussion focuses on the knowledge indexes that can help in increasing and enhancing the knowledge of adolescents by using Detektif Indigo and Justeru Impian Di Jaring novel as the data. The data of these novels also analyzed by using the semiotics theory.