==External links==
*[http://portraitofdecay.net/ghosts.nin.com/ The official ''Ghosts I-IV'' site (archived at Portrait of Decay)]
*[httphttps://wwwarchive.scribd.comorg/documentdownload/2224347nineinchnails_ghosts_I_IV/Nine-Inch-Nails-Ghosts-Inin_ghosts_I-IV-Book .pdf ''Ghosts I-IV'' PDF at Scribdarchive.comorg]
*[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