 Jones joined Knopf in 1957 as an assistant to Blanche Knopf and editor working mainly on translations of French writers such as Albert Camus and Jean-Paul Sartre.Before that she worked for Doubleday, first in New York City and then in Paris, where she read and recommended "The Diary of Anne Frank", pulling it out of the rejection pile.Jones recalled that she came across Frank's work in a slush pile of material that had been rejected by other publishers; she was struck by a photograph of the girl on the cover of an advance copy of the French edition.