An in-depth understanding of subjects in the General Studies Paper of the Civil Services Exam can help candidates sail through.
One should start with the basics, and for this NCERT books are useful. It should be followed by in depth study of relevant topics from graduation level text books in relevant subjects. Alternately, a good general studies book can also be used. This facilitates availability of most of the reading material in one source. Reading newspapers and magazines and periodicals on economic, political and social issues keeps one updated with current developments and policy changes