You need a printer that can print double sided.
You wanna print the "us_printready" PDF. It should print them in a way where you can stack em on top of each other. Staple and fold together like a book. The pages will look like they're all over the place, but it should work out when it's folded together.
If your printer is giving you trouble with the double sided thing, you can just print the "A4_doublepageview" PDF and staple it on the left edge. Like it's a very wide booklet. Front cover will look a little wonky, but at least it'll be altogether.