“Measured against a best seller in its first flush, sales of any classic book are piddling, of course (unless the classic has just been made into a blockbuster movie, in which case all bets are off). But the overall sales picture resembles the proverbial tortoise-and-hare scenario: As the race goes on, the classics win out. This may seem intuitive; but what’s surprising is that often the race doesn’t have to go on long at all.”