Assuming you are asking for prelims so you can consider below names -

HISTORY: Bipin Chandra, NCERT old books for class XI and XII

GEOGRAPHY: NCERT books for class IX to XII and a good ATLAS

POLITY: Vajiram Yellow book for Polity would suffice

SCIENCE AND TECH : Spectrum Publication

ECONOMICS: NCERT for class XI and XII, Newspaper

INTERNATIONAL RELATIONS, SPORTS, AWARDS, PERSONALITIES, ENVIRONMENT, GOVT. NEW PROGRAMMES AND POLICIES: Newspaper, Economic Survey, Yojana, Civil Services Chronicle.

Hope this helps!!!