Here I mentioned some best books, magazines, and newspapers you should refer to while preparing your UPSC CSE strategy

Polity-

1. Indian Polity by M. Laxmikanth
2. Introduction to the Constitution of India by D.D. Basu (optional for deeper understanding)

History-

• Ancient & Medieval – NCERTs (Class 6 to 12)
• Modern India – Spectrum by Rajiv Ahir
• Art & Culture – Nitin Singhania

Geography-

• NCERTs (Class 6–12)
• GC Leong – Certificate Physical Geography
• Atlas (Oxford or Orient Blackswan)

Economy-

• NCERT Class 11, 12
• Indian Economy by Ramesh Singh or Mrunal’s Economy Notes (PDFs)
• Budget & Economic Survey (summary by Vision IAS/Insights)

Environment-

• Shankar IAS Environment Book
• Current affairs coverage

Science & Tech-

• NCERTs Class 6–10
• Daily current affairs + monthly magazines (for latest developments)

Ethics (GS Paper 4)

• Lexicon or Subbarao for concepts
• Case studies from ForumIAS / Vision IAS / previous year papers

Essay

• No fixed book.
• Use GS notes, editorials, and practice writing on diverse topics.

For Newspaper, you can choose either The Hindu or The Indian Express.

Lastly, for magazines you can choose Vision IAS Monthly Magazine, Insights IAS Current Affairs or Drishti IAS Monthly

Stick to limited sources and revise them multiple times. Don’t try to read everything — UPSC rewards depth over quantity.