Hi Rakesh,

The syllabus for IAS prelims and mains can be found at the UPSC official website.

The Books for preliminary and mains exam:-

1. Indian Polity for Civil Services Examinations by M. Laxmikanth (Polity)

2. Indian Art and Culture by Nitin Singhania. (Culture)

3. Oxford School Atlas by Oxford Publishers. (Geography)

4. Certificate Physical and Human Geography by Goh Cheng Leong. (Geography)

5. Indian Economy by Ramesh Singh. (Economy)

6. Economic Survey by the Ministry of Finance. (Economy)

7. India Year Book (Current Affairs)

8. A Brief History of Modern India by Rajiv Ahir (Modern India)

9. General Studies Paper 2 Manual by MHE (CSAT)

10. NCERT Books