Important books for UPSC (IAS) Preparation: Prelims
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. Current affairs
The Hindu
PIB
Other important websites/applications
5. Science & Tech
Notes by Shankar IAS
Daily Newspapers
ISRO website
6. Environment & Ecology
Recent events on Climate change through newspapers