KKV is one of the greatest text books on methodology~~~

Every researcher and student in the field of political science or discipline of social science should know this famous text book as well as its funny other name "KKV".

It is no less than a miracle in the methodological works which have contributed a lot to both qualitative and quantitative researches. Since the first day of my PhD study, my supervisor told me first to read this book if I want to strengthen my methodological theory and practice. His recommendation was so strongly that it seemed there are no any other books worthy reading. Actually, it is true that this book can give one a strong background and basis of the methodological framework. However, everything should not be too absolute to defend. So, if there is spare time, one is strongly recommended to read other famous methodological books.