Rosamond du Jardin, née Neal, first wrote humorous verse and short stories for newspaper syndicates, then went on to sell approximately a hundred stories to such magazines as Cosmopolitan, Good Housekeeping, McCall's and many other publications, abroad as well as in the United States. She also wrote five novels for adults before her first novel for teenagers, Practically Seventeen, which was published in 1949.
She was married to Victor Du Jardin on October 28, 1925. They had three children, Jacqueline Neal, Victor Junior, and Judith Carol, with whom she would later co-author Junior Year Abroad.
In addition to writing, Mrs. Du Jardin frequently spoke at schools, and students enjoyed meeting in person the creator of some of their favorite stories. Mrs. Du Jardin enjoyed her school visits, too, because she liked and respected teenagers as individuals and firmly believed that they are interesting, normal and dependable people.
Born in the small town of Fairland, Illinois, Rosamond du Jardin was two years old when her family moved to Chicago. She lived there and in the Chicago suburbs for the rest of her life.