“The divide between sales of literary and commercial fiction has always been vast — the 345,000 copies that Marilynne Robinson’s Pulitzer Prize-winning 2004 novel “Gilead” sold in hardcover and paperback is an impressive figure, but not when compared with the more than 18 million copies of “The Da Vinci Code” in print in North America, and more than 60 million worldwide. These days literary fiction has to contend with two factors that are increasingly central to the publishing process: timing and volume.”