Comprehensive reading contributes to success in the UPSC exam by broadening candidates' knowledge base and enhancing their understanding of intricate topics. Regular reading improves vocabulary, comprehension, and critical thinking skills, all of which are necessary for answering complex questions. Furthermore, exposure to diverse perspectives through reading helps develop analytical abilities and articulate informed opinions. Engaging with current affairs and relevant literature fosters a well-rounded approach, ensuring aspirants are equipped to tackle various subjects effectively during exams.