Read: A Certain "Je Ne Sais Quo" by Chloe Rhodes (2013-72)
So what it is, is a collection of words and phrases like "carpe diem," "ketchup," and "schmuck," with a bit of etymology, a bit of modern usage, and a more-or-less whimsical example (often with an illustration that I'm pretty sure is intended to be whimsical but isn't). A moderate number of these were not known to me (for example, I didn't know that the literal sense of "ketchup" is "fish brine"), and two or three words were entirely new to me. So the time was not lost.
An excellent gift for the etymology buff in your house.