Dear Ali Malah,

I also intend to appear in the PCS exam 2013 for which I have opted optional subjects as follows:
1. Statistics
2. Ethics and Psychology
3.Sociology

In the first two subjects I believe that I have ample background knowledge however for Sociology I will start preparation from beginner level.

Now please help me out by evaluating these subjects and recommend me some books for last two subjects.

Thank you,