The second book in the Dorothy Dale series, in which Dorothy and her friends have an unfortunate encounter, which has long-lasting implications. Major Dale inherits some money, which enables him to send his daughter to Glenwood School, where she makes new friends - and enemies. (Summary by Lynne Thompson)Books in this 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) Margaret Penrose was a house pseudonym used by the Stratemeyer Syndicate.