Almost like a detective, the reader must try to puzzle out what has happened, what relationship X "really" has to Y. In "Dolores Ibarruri Sheds Bitter Tears," is the mother's report of her son's happy childhood just a remembered mirage? Is life inside a Fitzgerald novel a game invented by the narrator of "The Little Gatsby," or has the game indeed replaced any other reality? From the title story "Letter from Casablanca," with its double and triple...