UPSC CSE

Indian Polity

M. Laxmikanth

4.8

Standard reference. Used by 90% of toppers for GS2 preparation.

UPSC CSE

A Brief History of Modern India

Rajiv Ahir (Spectrum)

4.7

Comprehensive modern history. Covers the entire UPSC Prelims + Mains syllabus.

SSC CGL

Quantitative Aptitude

R.S. Aggarwal

4.3

The go-to for arithmetic, algebra, and data interpretation across all SSC exams.

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