This critique endeavors to analyze Alex Michaelides' novel The Silent Patient (2019) in the light of Lyotard's theoretical philosophy of postmodernism. Postmodernism is a contemporary movement that poses significant challenges to conventional assumptions of knowledge, rationality, truth, and objectivity. The concept of postmodernity also involves the discussion of a complex set of ideas and theoretical discourses which resist a fixed definition and final closure. Jean Francois Lyotard's theory of postmodern metanarratives versus mininarratives was proposed and published in his The Postmodern Condition (1979). For this study, textual analysis as a research method has been used to trace the presence of postmodern characteristics in certain words, dialogues and conversations between the characters. The research ends with findings and recommendations for future research.