@Ronakbaig

Thanks for your help with the essay. But please do keep in mind that this thread is specifically created for helping one member with the essay in the Essay forum. Kindly post your questions about other subjects and their books in their relative forums. Please refer to the following links:

For optional subjects: http://www.cssforum.com.pk/css-optional-subjects/
For Compulsory subjects: http://www.cssforum.com.pk/css-compulsory-subjects/