In the link given below, You can download all those books:
Booklists
Booklists
Reference
History
- History: A Brief History of Modern India – Spectrum publications
- History: Indian Struggle for Independence – Bipin Chandra
Geography
- Geography: Certificate Physical and Human Geography – GOH Cheng Leong
Polity
- Polity: Indian Polity by Laxmikanth
- Polity: The Constitution of India by P.M. Bakshi
GS I:
- World History (NCERT World History Story of Civilization) – Arjun Dev
- World History (Mastering Modern World History) – Norman Lowe
- Indian Society (Indian Society for Civil Services Main Examination) – Kumar M.Senthil
- Indian Geography (Geography of India) – Majid Husain
- World Geography (World Geography) – Majid Husain
Economy
- Economy: Economy by Sankarganesh
- Economy: Indian Economy by Ramesh Singh (Reference only)
GS II:
- Governance (From Government to Governance) – Kuldeep Mathur
GS III:
- Indian Economy (The Indian Economy) – Sanjeev Varma
- Internal Security (Challenges to Internal Security of India) – Ashok Kumar IPS