For book suggestions
i would suggest following books
1.International Relations by Palmer and Perkins(Rs.300 price of pirated copy)
OR
Understanding International relations by chris,you can download its soft copy from the following link
http://www.google.com.pk/url?sa=t&rc...55JINemObGkvjw
And for South Asia
Politics of nuclear war in south Asia by Bhumitra Chakma(fpsc suggested)
NOTE
as a student of international relations you can not afford to limit yourself to the books materials only ,you must keep yourself updated with the latest developments in the world through TV, Dawn newspaper, websites of institute of strategic studies Islamabad(http://issi.org.pk/), diplomat magazine(http://thediplomat.com/)
Wikipedia and Google for miscellaneous search
Regards