NCERT books play a crucial role in UPSC preparation as they provide a solid foundation in essential subjects. They are concise, well-structured, and cover the syllabus coherently, making complex concepts easier to grasp. Aspirants can utilize NCERT materials for subjects like History, Geography, and Polity to build a strong base, before moving on to advanced resources. These books also prepare students for fundamentals and basic concepts, which are vital for higher-level understanding. Therefore, incorporating NCERT texts into study plans is highly recommended for UPSC aspirants.