Marlena Bittner will join Flatiron Books on May 15 as the director of publicity. She is currently the director of publicity at Little, Brown.

At Random House Children’s Books, Melissa Zar has been promoted to associate marketing manager. Robby Brown has joined as advertising manager. He was previously at Macmillan Children’s Books. Alexandra Post has joined as advertising assistant.

Abby Koski has been named publicist at Soho Press. She was previously at Farrar, Straus, and Giroux.