i need to know about persia and persian literature...

The most famous Persian writer, of course, is Omar Khayyam. This is a very good article on Persian literature.

http://www.iranonline.com/literature/Articles/Persian-literature/index.html

A collection of Persian Literature
http://www.iranonline.com/literature/

This site looks at both ancient and modern literature.
http://www.art-arena.com/sagalit.htm