.

1) Ancient history — Old NCERT by RS Sharma & Tamil Nadu Board.

2) Medieval history — Old NCERT by Satish Chandra & Class 11th Tamil Nadu Board

3) Modern history — Spectrum

4) Art & Culture — Nitin Singhania

5) World history — New NCERT & Norman Lowe

6) Geography — GC Leong, NCERT & Oxford Atlas

7) Polity — M.Laxmikanth

8) Economy — Ramesh Singh / Sanjiv Verma

9) Environment — NCERT, Current affairs & Shankar IAS

10) Ethics — Lexicon

11) Science and Tech — Science Reporter, ICSE books ( class X -XII ) & Ravi P Agrahari

12) Internal Relations — Current Affairs Compilations

13) Internal Security — Ashok Kumar

14) CSAT — Arihant

15) NCERTs — Class 6–12 for concept building

16) Current Affairs — Hindu / Indian Express / Monthly Magazines