Ayesha Mirza has joined Houghton Mifflin Harcourt as marketing manager in the adult marketing department. She was most recently a marketing manager at Macmillan for the company's trade, academic, and professional books, focusing on online marketing and social networking; prior to that, she was an associate marketing manager at Knopf. She is based in Houghton’s New York office. Also at Houghton, Meagan Stacey has been promoted to associate editor at Mariner Books. She was previously assistant editor.