If someone who has opted this subject is needed to give answers to the following questions which are as follows.

1 - Is it a conceptual subject?
2 - How much time does it take for the preparation?
3 - Would it be a wise decision to opt it in 2018, while keeping in view the 2017 paper?
4 - Are there any good book(s) available in the market which could cover the whole syllabus?
5 - Does this subject require an extensive study from different sources or one can just only rely on the books(if one could find
good ones from the market)?
6 - Is it difficult or easier than Public Administration?

Please reply if someone has opted this subject.