We hear . . . we hear

THAT The Post’s crime reporter Philip Messing, retired NYPD Lt. Bernard J. Whalen and Detective Robert Mladinich, will celebrate their new book “Undisclosed Files of the Police” at the Mysterious Bookshop on Wednesday evening . . . THAT Alison Brod has renamed her eponymous company ABMC, Alison Brod Marketing and Communications . . . THAT the Henry Street Settlement gala, customarily held at the Plaza, will be at Lower East Side theater Metrograph on Oct. 18.