American Denim: A New Folk Art, by Peter Beagle (over size TPB, 1975, $4, which is 1/3 the current internet price.)
How do you make jeans into folk art? Well, you take paint, embroidery, sequins, applique, studs, feathers, beads, yarn, bleach, rope, metal or anything else you can think of, add in a lot of time and a lot of talent, and then maybe, just maybe, you can come up something that looks like the folk art displayed in this book.
Look for Denim in the sewing arts section, for lack of a better place to put it. (Art would be another place it would feel at home, but which section of art?) It will be avail. 10/21.