Here is the GURPS Campaign Booklet printed on A4 paper but printed off as a booklet. It should work with US Letter Size paper as well. Although the one in the video is not Dungeon Fantasy, it’s for my GURPS Fallout game which just shows its versatility. I have a long arm stapler to staple the pages together.
You can try out version 2.1 yourself HERE
I’m still working some of the bugs out and might change some things around yet so updated versions are on the way.