Mr. M., that is indeed from the mid-70's. I have several from a young lady who cranked these silkscreens out and then disappeared. A terrific artist, IMO. She just gave them away to people.
As far as writing goes, I suppose I identify with Vennegut's Elliot Rosewater whose favorite poem was,
"Here I sit, broken hearted.
Camr to s***, but only farted."
In that vein, one of my personal favorites was a print ad for Scott tissue;
full page, small beauty shot in limbo with small shadow for placement.
Filling the page in extra bold type; "Would you rather squeeze the Charmin, or pinch your pennies?" (maybe you had to be there... ?)
So, back to this book. Someone seemed to resent his amateur philosophy.
I would like to propose that all the best philosophical cogitation is amateur. When it becomes professional, it's just re-organizing of other people's writing- no? It seems to me original thought HAS to come from amateurs.
It's interesting also that peopple rarely take the book as a whole, but focus on the first half. I suppose that's because that's the part that makes sense. As motorcycle riders, we can identify with it. I actually know people who really would not use shim material cut from a soda can.
For out-of-body recording of constantly wondering if you turned the stove off, I really really liked The Accidental Tourist. That book I learned a lot from.