Publishers Marketplace reports this morning that Gary Gentel has been promoted to interim president of Houghton Mifflin's Trade and Reference Division, effective immediately. Gentel moves up from corporate vp, director of sales, a position he's held the last four years. HM CEO Tony Lucki told employees today that "Gary will lead the division's strategic direction with the support of the trade and reference management team, who will report directly to him. He will also be an instrumental part of planning the integration of Harcourt Trade with Houghton Mifflin Trade and Reference."