DAVID W. BARBER, WHO HAS DELIGHTED READERS all around the world with Bach, Beethoven and the Boys, Accidentals on Purpose, Getting a Handel on Messiah and other internationally bestselling books of classical musical humor, takes a more serious turn with his first extended foray into fiction - the collection Atonement and Other Stories. In this collection of 13 short stories - call them a Barber's dozen - the first eight cover a...