Okay I'll enlist down some of the top books that you can use for MA in sociology for entrance exams like JNU OR DU, Mumbai university exams.

1) Haralambos and Holborn

2) Sociological theory by George Ritzer

3) Selected topics from IGNOU.

At the same time do not miss on reading about the Indian thinkers, sociologists and history of the Nation. Read about Babasaheb Ambedkar, Mahatma Gandhi, Jawaharlal Nehru, etc. specially.  (You can use Ramachandra guha's makers of modern India.)

Some other good books that you can prefer are Sociology Sachdeva & Vidhya Bushan
Sociology T. B. Bottomore. Sociology Dictionary William P. Scott.

Kindly refer the link below to have a more detailed information...

https://university.careers360.com/articles/7235-Career-review-on-Sociology

Best wishes. Thank you. Feel free to ask any questions in the comments section below if you have any.