Check this Book HERE.
The book is available on Indian Telugu Civil Servants Association blog. The link will take you that site.
The book is must for Civil Services Mains. With the changed structure, a good reading and notes will be highly rewarding.
Just a side issue. Why do the government publication make Right Reserved fetish. On one hand, it is talking about RTI. On the other hand, It is promoting E-governance. However, while sharing basic data, they intend to exercise their intellectual Property right. Do these secretaries start feeling themselves as scholars and writers? Amusing.