Markus Dohle, “head of a printing unit at Bertelsmann’s Arvato division, replaces Peter W. Olson, who has had the job since 1998, but was hampered by losses at the unit amid a wider slowdown in sales of books. New York-based Random House’s imprints include Alfred A. Knopf and Doubleday, and its authors include John Grisham, Sophie Kinsella and Jonathan Kellerman.”