The following materials will be immensely useful for both UPSC civil services Prelims and Mains. Some questions in Prelims have been asked from these materials. If you like this post, please do share or leave below a comment.
2: History and Culture through the Ages
3: Languages and Literature
4: Religion and Philosophy
5: Painting, Performing Arts and Architecture
6: Science and Technology
8: Social Structure
9: Spread of Indian Culture Abroad