This research aims at providing a detailed description by way of presenting an illustrative analysis of the cognitive stylistic features of Dan Brown's The Da Vinci Code (2003). The significant target of the study is to manifest the aesthetic characteristics through connecting the text- world to the reader's world, where both of the reader and the writer become active. It also explains how the fictional work manages to extend the reader's mental space so as to be able to taste and interpret the literary works. The investigation adopts a qualitative method. The aim of the qualitative analysis is a complete and detailed description of examples. The research is tackled within Gavins' (2007) text world theory. On the basis of the proposed theory, a comprehensive analysis of the novel in terms of discourse-world level, text- world level, and sub-world level is to be carried out. Analyzing these worlds contributes to the narration. It also explains the conflict between the novel's characters which is a result of their different mental spaces or worlds, and how this diversity becomes responsible for the emergence of smaller worlds inside the main world. The investigation includes different types of discourse like face-to-face conversations, narrative structures, description, visions, and expression of feelings and emotions.