I like to think that most, if not all people have read The Hitchhikers Guide to the Galaxy.
Fewer, however, will have whiled away many a frustratingly-enjoyable hour being hammered time and time again by Infocom’s HHGTTG text adventure in the ’80s. Here’s your chance!
The BBC have remade their Flash remake of the original Infocom game using JS, and you’ll be glad to hear that it’s just as mean as the original.
Their Technical FAQ is a fun read, too 
The Hitchhikers Guide to the Galaxy – 30th Anniversary Edition