Of all the four General Studies papers in the UPSC civil services mains examination, the General Studies paper III is often considered the most diverse paper in terms of the vast coverage of subjects. It incorporates the subjects of economics, internal security, disaster management, science and technology and agriculture.

The topics internal security and disaster management are diverse and also equally marks fetching in both the prelims and the mains exams. These topics are also highly linked with current affairs. Almost every question asked from these areas is related to current events. So, apart from standard textbooks, you should also rely on newspapers and news analyses as well for these sections.

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Subject Name of the Book Author/Publications 
INDIAN ECONOMY Indian Economic Development XI Standard NCERT 
 Introductory Macro Economics XII Standard NCERT (Ignore all diagrams & mathematical formulas) 
 Newspaper The Hindu / The Indian Express  
ECOLOGY & ENVIRONMENT Certificate Physical & Human Geography Goh Cheng Leong  
 Biology (Chapters pertaining to Ecology) XII Standard NCERT 
 Chapters on Environment India Year Book 
 Newspaper The Hindu / The Indian Express 
SECURITY ISSUES India’s Security in a Turbulent World Jasjit Singh, published by National Book Trust of India 
 Newspaper The Hindu / Indian Express 
SCIENCE & TECHNOLOGY Biology VIII, IX & X Standard Books 
 Newspaper The Hindu / Indian Express 
 Science Reporter for Science & Technology’ Monthly Magazine