Dorothy Dale’s Strange Discovery is the eleventh in the series. It is the most difficult one to find. This is the only e-book or print versions other than through rare-book dealers we know of. Dorothy and Tavia have been invited to visit one of their Glenwood School classmates—Jennie Hapgood—the daughter of a large farm owner who has fallen on hard times. If he can’t raise a considerable sum of money quickly, he may be forced to sell the beautiful family farm—Sunnyside. It looks bad. How in the world is Dorothy going to find enough month to help her friends?
Margaret Penrose was a Stratemeyer Syndicate pen name used for the Dorothy Dale, The Radio Girls (later reprinted as The Campfire Girls) and The Motor Girls series. Lilian C. Garis, whose husband Howard wrote many novels for Stratemeyer over 30 years, including The Motor Boys series, wrote volumes 1-8 and 11. W. Bert Foster wrote 9, 10 and 12. After a long gap, Elizabeth Duffield Ward wrote the final volume, number 13.