MY BROTHER, ERNEST HEMINGWAY (283 pp.) Leicester Hemingway World ($4.95).
Ernest Hemingway continues posthumously to be good for the publishing business; eight books and nonbooks are currently in print about him and his work, with more sure to come. The two latest are examples of sibling nonrivalry: Older Sister Marcelline's clutch of childhood memories recently serialized in the monthly Atlantic, and this collection of Kid Brother Leicester's reminiscences serialized in Playboy.
Leicester Hemingway, dubbed by Ernest "The Baron" for reasons unexplained, reveals himself as the archetypal kid brother. He was 16...