This master s thesis aims at analyzing how the post-truth combined with performance enhance the reality-effect in two autofiction books named Delegado Tobias and Inquérito Policial – Família Tobias both by Ricardo Lísias. Also, we will observe how this combination of these inherent concepts to the present are expressed in Brazilian Contemporary Literature. From this perspective, this study establishes a critical analysis about how the use of these elements impacts the perception of readers who are in a context which leads them to be more and more exposed to the information bombardment and it becomes difficult to distinguish between fact and fiction. This research also provides some considerations about the necessity of reality in fiction books to turn it into one of the most evident characteristics in literary books produced in Brazil in 21st century.