Best UPSC preliminary exam books

Hi I am preparing for UPSC preliminary entrance exam so can you please suggest me the books for this exam?

[Quick Sam]

Ok, as you are preparing for UPSC preliminary entrance exam so here I am suggesting some books for this exam.

UPSC preliminary exam books

General Studies Paper I 2014



Ethics, Integrity and Aptitude
Santosh Ajmera, Nanda Kishore Reddy



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