Zork I - The Great Underground Empire

Adventure Collective review - http://www.adventurecollective.com/reviews/zorki.htm
Rated 5/5. "Zork I is a must for any text adventure fan, new or experienced." By Karen Tyers

David Tanguay's Review - http://www.sentex.net/~datanguayh/games/zork01_rev.html
Rated +0 on -5 to +5 scale. Review and some puzzle solutions.

Infocom Documentation Project - http://infodoc.plover.net/manuals/zork1.pdf
PDF file of scanned original game manual.

Infocom Games: Zork I - http://www.infocom-if.org/games/zork1/zork1.html
Game information, box photos and blurb, specifications, release information, and sample transcript from manual.

Infocom Homepage: Zork I - http://www.csd.uwo.ca/Infocom/zork1.html
Description, release information, and packaging details.

Loonygames' Bargain Bin Review - http://www.loonygames.com/content/1.9/bgnbn/
"Zork was the first game I ever played that mixed humor and adventure successfully."

The Great Zork I Page - http://www.angelfire.com/ut/henryshermitage/zork1.html
A couple Zork I links.