Some links of bengali story books:

 

http://www.banglapapers.com/books.htm

 http://freebanglapdfdownload.blogspot.in/

http://www.deshiboi.com/home.php

 http://www.allbanglabooks.com/ 

 http://www.4shared.net/free+bangla+book+pdf

http://www.banglaebookdownload.com/

http://banglapdfboi.com/

http://www.ebooksdunia.com/