I don’t like carrying my copy of Dungeon World around. It’s a 400 page hardcover and I’m the one who has to run it, so I don’t even get to take advantage of the +1 vs. haters it gives me. So I made myself a smaller version, with just the stuff I use, in a slightly different order, and called it Truncheon World, the truncated Dungeon World.
You can get the pdf for free at DriveThruRPG. Or you can pay, if you want.
This is just a shorter version of the text. It won’t let you make characters and there’s no monsters in it. Or examples of stuff, so you probably don’t want to try learning how to play the game from this book. If you want a slim volume that’s easy to reference while running the game, this might be the thing for you. If even this is too large, you’re gonna have to make your own.