A secret: I stole that title from a MAD Magazine article about free stuff, albeit useless stuff. In that instance it was the US Government Printing Office which you know, if you are of a certain age, was in Pueblo, CO of all places.
The cartoon panel accompanying it had the reader engrossed in a pamphlet on The Mushrooms Of Angola and I adopted it as a catch-all for the irrelevant and insignificant.