NCERT books are vital for UPSC exam preparation as they provide a solid foundation of basic concepts across various subjects. These textbooks are well-structured and cover essential topics in an easily comprehensible manner, making them a popular choice for aspirants. They help in building a clear understanding of Indian history, geography, and politics, which are crucial for the exams. Moreover, NCERT materials are often recommended by experts, as they focus on core ideas and encourage analytical thinking, preparing candidates effectively for both Prelims and Mains.