Clicking on the pdf links from the zgeizt.com home page will give you a number of errors that indicate specific files can not be found. If you click on the Network Theory pdf link it will give you the following page linked from 4-ev.com:
The requestedted file Abigail.txt was not found on this server.
Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request.
If you then go to 4-ev.com/Abigail.txt you will get the following simple text file:
follow the Queen of Hearts. joyful playful games