The Infocom Gallery: The Lurking Horror - High-quality scans of the gray box, manual, and ID card. - http://infocom.elsewhere.org/gallery/lurking/lurking.html
Infocom Documentation Project - PDF file of scanned original game manual. - http://infodoc.plover.net/manuals/temp/lurking.pdf
Infocom Games: Lurking Horror - Short introduction and specs. - http://www.infocom-if.org/games/lurkingh/lurkingh.html
Infocom Homepage: The Lurking Horror - Description, box art, release information, statistics, and packaging details. - http://www.csd.uwo.ca/Infocom/lurking.html
Capsule Review by Matthew Murray - "Infocom's first and only attempt at a true horror story succeeds with a vengeance, and Dave Lebling is in his finest form in The Lurking Horror." - http://www.matthewmurray.net/Reviews/ComputerGames/Lurk.html