We learned how to make these in class last week.
Boxing a book can be useful for presentation or preservation (ie if a book is falling apart but it will lose value if rebound (restored), you can construct a made-to-measure box for it to live in).
This box is made to hold A4 sized sheets of paper. It's lined with a screenprinted paper from India and the cloth is 100% cotton. You can kind of see in the paper where the screenprinted design was repeated.
What surprised me most was that you don't have to pay attention to grain direction of paper, cloth, or book board when you are making a box! So box making would be a good way to use up scraps of stuff.