Aspirants can effectively utilize books and study materials for UPSC exam prep by developing a structured approach that involves careful selection and strategic reading. Prioritizing core materials that cover crucial topics thoroughly while supplementing with current affairs and relevant case studies is essential. Creating summaries and highlighting key points helps in retaining information and facilitates quick revisions. Additionally, solving previous years' question papers and engaging in mock tests can significantly improve understanding and application of concepts. Managing time efficiently while covering diverse subjects ensures a holistic preparation strategy, aligning with the complexities of the UPSC exams.