Aspirants can use public libraries to aid their UPSC preparation by accessing a wide range of books, periodicals, and study materials without financial constraints. Libraries provide quiet study spaces and resources that can facilitate focused learning. Engaging in library events or study groups can enhance collaborative learning and motivation. Additionally, using reference materials available in libraries, such as previous years’ question papers or exam guides, can streamline preparation. Overall, leveraging public libraries enriches the learning experience and can result in a more effective study routine during UPSC preparation.