Margaret Penrose was a house pseudonym used by the Stratemeyer Syndicate for series such as; Dorothy Dale, The Motor Girls, Nancy Drew, etc.Dorothy is a Victorian "Angel in the House" in training a moral role model for just about everyone in the town of Dalton, especially her "wildflower" best friend Octavia. This, along with other Dorothy Dale stories, teaches moral lessons and "proper" behavior and the advantages of good habits.Dorothy Dale's Great Secret is the third book in the Dorothy Dale series. Here Dorothy proves herself to be a good friend to Octavia Tavia by undertakes the perilous task of rescuing Octavia and saving her reputation with help from her cousins Nat and Ned White.Margaret Penrose was a house pseudonym used by the Stratemeyer Syndicate for series such as; Dorothy Dale, The Motor Girls, Nancy Drew, etc.