I am putting together a round robin mailart zine project on www.swap-bot.com in the "Zines, Mailart, and Other Cool Stuff" (ZMACS) group and this was the first prototype.
The idea is to sew pages together down the middle, fold them in half, tape the booklet shut, and treat it like a fat postcard. The next person cuts the book open, flips open your page and does the same process on a new page.
At the end of the swap, each person will have their own zine of mailart.
This one went from MA to CA with no problems. It is now going to make a stop in MD before coming home to MA.