Perrotta’s previous books ‘Election’ and ‘Little Children’ were made into films, and ‘The Leftovers’ became an HBO series.  His new book, ‘Mrs. Fletcher,’ tells the story of a single mother whose only child has left for college. Perrotta says the book was inspired by the upheaval he experienced when his own kids moved out. Also, Lloyd Schwartz reviews a collection from Austrian pianist Artur Schnabel.