What is the book list for PSIR as an optional?
PSIR is an optional subject for UPSC CSE. We will approach the sources syllabus wise and recommend Basic sources + Advanced sources for those who are thorough with the basic sources. Please do not try to read three sources for one portion at a time. First cover basic sources for the entire syllabus and then move on to vertical upgradation or value addition. Also apart from reading a source the key to UPSC lies in having command over what you have read. So ensure you read only that much you can revise.
BOOK LIST