Little Green by Walter Mosley Doubleday, $25.95, 291 pages, ISBN 978-0-385-53598-4 I’m asked, from time to time, Why bother reading fiction?  A number of answers spring to mind, such as; to entertain myself; to see how other people think; to educate myself by associating with smart people among others.  But the best reason I can think of to read fiction right now is, to develop empathy for our fellow