==External links==
*[http://portraitofdecay.net/ghosts.nin.com/ The official ''Ghosts I-IV'' site(archived at Portrait of Decay)]
*[http://www.flickr.com/photos/nineinchnails/sets/72157604051114463/ Photos from the recording of ''Ghosts I-IV'']
*[http://www.billboard.com/bbcom/news/article_display.jsp?vnu_content_id=1003718389 "New Nine Inch Nails Album Hits The Web"] from Billboard.com News