Deb Futter, president and publisher of Celadon Books, has taken on additional responsibilities as president and publisher of Flatiron Books. She succeeds Flatiron founder Bob Miller, who will depart Macmillan Publishers after 11 years with the company. Flatiron SVP and publisher Megan Lynch has been promoted to EVP, reporting to Futter, overseeing all aspects of the day-to-day operations of Flatiron.