What do you mean ? You want to add a book in your Zotero library ?
Read http://www.zotero.org/support/getting_stuff_into_your_library
and http://www.zotero.org/support/quick_start_guide

Edit: and don't double-post: adamsmith asked you to clarify your question here.

(although, in this case, ipsita probably should have started a new forum thread to begin with, since his question didn't seem to be directly related to the starting post of the other thread)