The objective of the author in the book Sociological Concepts is that the concept of sociology can help the curious readers with different theories, functions, influences, factors and different processes. For the purpose of explaining these principles and procedures, suitable examples have also been given as necessary. Language and style have been adopted in such a way that the initial knowledge of the subject can reach the students conceptually. The main focus is kept in mind. It has been said that the students can understand the subject matter properly. Keeping in mind the convenience of the students, the subject has been given in simple language. The titles are given in Italian words as per the requirement. In the end the test questions are given. It is my belief that this will be useful not only for university level readers but also for the students of Union Public Service Commission (UPSC) and Public Service Commission (PCS) of various states. Your suggestions to improve it further are welcome.