*[http://www.portraitofdecay.net/www.phillipgraybill.com/ www.phillipgraybill.com c. 2010] (contains more Ghosts imagery than his current website)
*[http://www.portraitofdecay.net/www.graybillstudio.com/ www.graybillstudio.com c. 2010] (contains unused commissioned NIN photography)
*[httpshttp://ia600205www.usscribd.archive.orgcom/view_archive.php?archive=document/232224347/items/nineinchnails_ghosts_I_IV/nin_ghosts_INine-Inch-Nails-Ghosts-I-IV-Book ''Ghosts I-IV_pdf.zip ghosts.ninIV'' PDF at Scribd.com pdf download at archive.org]