Name                                               Last modified      Size  Description
 Parent Directory                                                        -   
 book.pdf                                           21-Oct-1999 18:25  1.4M  
 book.ps.gz                                         21-Oct-1999 18:25  504K  
 gobook.tar.gz                                      21-Oct-1999 18:26  285K  

I fetched these documents from this site:

http://www.cs.arizona.edu/people/bridges/go/gobook.html

The pdf and ps appear to have been built using LaTeX2e 
from the files in the tar gz.