Hii Asif!

You haven't mentioned the specific field under economics that you would prefer to study after graduation. Here, I list the general books you could refer if you are an economics Student.

* The undercover economist by Tim Harford

* Frekonomics by Steven D. Levitt and Stephen J. Dubner

* Thinking Fast and Slow by Daniel Kahneman and Amos Tversky

* Animal Spirits by Akerlof and Shiller.

* The Armchair Economist by Steven E. Landsburg.

Hope this helps.

Good luck!