PSIR Optional Booklist

I would recommend using any of the popular notes available in the market.

Apart from notes, you can use selective books to enrich your answers.

The booklist of PSIR Optional for UPSC Civil Services Mains Examination is given below:

Paper I-A

Paper I-B

Paper II-A

Paper II-B

Related Links:

1. PSIR Optional Syllabus
2. PSIR Previous Year Questions