Richard Slotkin, Olin Professor of English, Emeritus, is the author of a new book, Greenhorns: stories, published Oct. 10 by Leapfrog Press. Slotkin writes more personally in Greenhorns than in his past nonfiction books, in a series of linked semifictional stories based on his ancestors' immigration from Eastern Europe early in the 20th century. A kosher butcher with gambling problems; a woman whose elegant persona conceals unspeakable horror; a Jewish Pygmalion who turns a wretched orphan into a “real American girl”; a boy who clings to his father’s old-world code of honor on the mean streets of Brooklyn; the “little man who wasn’t there,”…