Which Is The Best Book Of The IAS General Knowledge Study Series?

There is not one single book that can help you in the General Knowledge Study for the IAS exams. But there are some reputable publications that can provide you with good service. One of them is Unique General Studies. It publishes a book that covers all the subjects in one guide and the matters written over there are well researched.
       
But you should not concentrate on one book and should consult other materials also. When you are talking about history one of the best books is 'Wonder that was India' written by A.L. Basham. You should also consult the books of eleventh and twelfth published by NCERT. They provide you with good well researched material.
       
If you read these books and discuss the material within your group then certainly you will be in the good position to clear you general studies paper of the IAS examination.

Sociology

If u R really Want to do IAS U Need to concentrate more on topic & not on books. "Because
NOthing is "General" and If there is Such topic then you wont get that "General" kind of Questions in IAS