Important Booklist for UPSC IAS Prelims In Hindi: History: Ancient and Medieval Indian History: India’s Ancient Past (भारत का प्राचीन इतिहास)  by R.S Sharma. Medieval Indian History by Satish Chandra– Class 11th Old NCERT. Themes in Indian History- Part I: Chapters 1 to 6 The Harappan Civilisation. Early States And Economies. Early Societies. Cultural Developments.