Recently I found a copy of the millennium edition Whole Earth Catalog at the thrift store, and knew I wanted to make a book with the pages. There are enough pages to make a small library, as you probably know. I'm sure many of us grew up with the WEC as a bible of new age, green, counter-cultural resources.
Coptic bound using hand spun hemp thread
I used random pages from the catalog, covering all manner of subjects, and bound them in with the text running alternately horizontally and vertically. I didn't intend for the pages to be written on. The paper is a bit thinner than preferable for writing or drawing on, but heavy enough to hold up well to hand binding.
So, no function necessarily. Except to be a cool hand bound book.