History:
Ancient & Medieval India –
- Tamil Nadu Board 11th Class Book
- Old NCERT 11th Book
Economics:
- Class 6th – 12th NCERT
- Government Budgeting
- Current Affairs
Modern India:
- 12th Class NCERT
- Spectrum
Art & Culture:
- CCRT Website
- 11th Class – An Introduction to Fine Arts
Science & Tech:
- Basic NCERTs
- Current Affairs
Polity:
- Laxmikanth
- 11th + 12th Class- NCERTS
Geography:
- Goh Leong
- NCERTs 11th & 12th Books
- Oxfrod+Mapping
Environment & Ecology:
- NCERTs 11th & 12th Biology
- Current Affairs
- M/o Environment, Forest & Climate change
Before jumping to the advanced books, these are the books that are required to clear your basic understanding.