She went on to write 15 books, including
"The Standard Catalog of American Automobiles", considered by auto journalists as the most comprehensive work on the history of
defunct automobile companies. Her co-writer was Henry Austin Clark, Jr. Some of her other works include ''"The Classic Era," "Pioneers, Engineers, And Scoundrels: The Dawn Of The Automobile In America," "The Star and the Laurel: The Centennial History of Daimler, Mercedes, and Benz, 1886-1986," “Packard: A History of the Motor Car and the Company,” "The Cars That Henry Ford Built," "Walter L Marr: Buick's Amazing Engineer,"
(with James H. Cox), (books which won the Nicholas-Joseph Cugnot Award), "Chevrolet: A History from 1911," (with Robert Ackerson), "Speed, Style and Beauty,
and "My Two Lives"
She also became editor of the Classic Car'' magazine, for the Classic Car Club of America. == Awards ==