Finding this and having a paper bag to hand, I tried this.
HOW TO – Make a paper bag book:
Simple how-to on making a book out of paper bag – “For centuries, people have made books from all sorts of materials and in all shapes and sizes. While most books today are printed in large numbers and are bound mechanically, some are made by hand. A handmade book is special in that you probably won’t find another one like it anywhere in the world. It is a special art form for telling stories, expressing feelings and sharing ideas. Here are instructions for making a simple book out of a paper bag” [via] – Link.
As I held it in my hand, I realized this might be how real books and magazines are laid out and printed. Some stitches and glue along the folded part and some cuts to create still more pages once the stitches and glue are in, and you would have 16 pages. I have some large sheets of poster paper, as well as some rolls of art/drawing paper. Some projects may result.