1.HISTORY:
Ancient and Medival history: 

•  6- 12 NCERTS ( old /new)
•  old NCERT class 11 Ancient India by RS Sharma
•  old NCERT class 11 Medival India by Satish Chandra

Modern history : 

•  A Brief History of Modern India by Spectrum
•  History of modern India by Bipin Chandra

Art and Culture:    

• NCERT Class XI – An Introduction to Indian Art
•  Art and Culture by Nitin Singhania

2.Indian and World geography:   

•  NCERT class 6-12 
•  Certificate  Human and physical Geography – G.C Leong

3.Polity: 

• NCERT class 6-12
•  Indian Polity – M Laxmikanth  

4.International Relations: 

• Refer places in News from Hindu Newspaper

5.Economy: 

• NCERT class 9-12
•  Indian Economy by Sanjeev Verma
•  Economic Survey
•  Budget Speech

6.Environment: 

•  NCERT biology class 12 last 4 chapters
•  Shankar IAS
•  Current Affairs

7.Science and Technology:

• NCERT class 6-12
• Developments in Science and Technology – Spectrum
• Current Affairs

8.SCHEMES AND GOVERNMENT POLICIES :   

•  Vikaspedia 
•  PIB

9.CURRENT AFFAIRS :

•  Hindu News paper
•  Indian Express
•  PIB

10.CSAT:

• Tata McGraw Hill CSAT Manual 
•  CSAT II – Arihant