I read my older brother's borrowed copy when I was in junior high. Me and two buddies went to the Ace Hardware and bought more than a dozen packets of morning glory seeds and then some cheese cloth at the Publix in the shopping center across Michigan Ave. June, 1980.
i had a copy back in the early 80s. Made the mistake of lending it to somone and never got it back. It was notorious as a book that once borrowed, was never returned. I've hear from many other people who lent it then lost it. I wonder if your brother ever returned it?