The letters, many previously unpublished, of Volume 3 (1926-1929) explore Hemingway's move into the American mainstream and a lifelong publishing contract with Scribner's. Under the guidance of the legendary editor Maxwell Perkins, Hemingway begins to take his place on the national and international stage as a professional author.

Hemingway's letters, many previously unpublished, trace his transformation into a renowned professional author in the mainstream of American literature.