As Salam o Alaikum, seniors,
I have bought following two books for the preparation of CSS Sociology.

1. "A Simple Study of Sociology" by " Sachdeva & Gupta"

2. "Social Theory, Research and Problems" by "M. Iqbal Chaudry"

Are these books fair and helpful in prepration of Sociology?
Also suggest me some other book, if you think it necessary.