Dorothy Dale's Great Secret

The Dorothy Dale series was published by the Stratemeyer Syndicate under the house pseudonym Margaret Penrose. This was Stratemeyer's first "Girls Series". List of Books in the Series Dorothy Dale: A Girl of Today (1908) Dorothy Dale at Glenwood School (1908) Dorothy Dale's Great Secret (1909) Dorothy Dale and Her Chums (1909) Dorothy Dale's Queer Holidays (1910) Dorothy Dale's Camping Days (1911) Dorothy Dale's School Rivals (1912) Dorothy Dale in the City (1913) Dorothy Dale's Promise (1914) Dorothy Dale in the West (1915) Dorothy Dale's Strange Discovery (1916) Dorothy Dale's Engagement (1917) Dorothy Dale to the Rescue (1924)