Earlier quoted context omitted.
"Books are not oranges." As an aside, what do you mean by this? I would have an even harder time giving and answer to the best orange I've eaten. The Hobbit. My brother read it to me when I was just starting to read. When he was done I asked him to read it again. he said no and I learned to read in earnest. I was often shooed out of the adult section of the library. I have read lots of books by now.
> what do you mean by this That books are not a commodity.
That said, as the author alluded to, 'best' in this context is vague and can mean what we want it to, eg., person a may consider best to mean the book that has had the widest influence, where person b may consider it to mean the book that they personally found the most insightful, etc.