The Motor Girlsby Margaret Penrose Margaret Penrose was one of the various pen names used by the Stratemeyer Syndicate to put out popular series of kids books. The Penrose name was used for Dorothy Dale, the Radio Girls, and the Motor Girls series. Pages of The Motor Girls : Page 1Page 2Page 3Page 4Page 5Page 6Page 7Page 8Page 9Page 10Page 11Page 12Page 13Page 14Page 15Page 16Page 17Page 18Page 19Page 20Page 21Page 22Page 23