I have heard some good buzz from the Hemingway email group and Amazon about the new Hemingway book (Art Matters: Hemingway, Craft, and the Creation of the Modern Short Story) by author Robert Lamb. The book was published by LSU Press in January 2010 and was sold out by November and is once again on sale in February on Amazon where I just ordered my copy. I saw a very positive comment on Amazon.
Here is a brief bio (from Amazon) on the author:
Robert Lamb grew up in the Kingsbridge section of the Bronx and has also lived in Hartford, Connecticut and Cambridge, Massachusetts. He received his doctorate in The History of American Civilization from Harvard University and has been a professor at Purdue University since 1991.