As the Preliminary examination from 2011 will focus more on mental ability, logical reasoning, and data interpretation it’s important to have the right books for CSAT in advance. Those r here
Note: All the books mentioned on this page are highly recommended by fellow aspirants.
I strongly recommend you get hold of previous years solved SECTION-WISE question papers and the Civil Services Exam Syllabus. This will ensure you get off to a flying start in the IAS preparation.
Books for Paper 1 of Prelims
General Studies Manual (GS Manual)
When starting out with prelims preparation it is a must to have a GS manual with you. What is a GS manual? Well it is a all-in-one book for civil services prelims covering all the topics like History, Geography, Polity, Economy, Current Affairs, General Knowledge, Mental Ability, Facts, and more. It is very useful for finding all information at one place. Also many times the standard books do not contain information, especially the latest ones.