Carolyn Keene was a pseudonym used by the ghostwriters who penned the Nancy Drew series, originally created by Edward Stratemeyer (1862–1930). Stratemeyer was the founder of the Stratemeyer Syndicate, a book packaging firm in the late 1920s and early 1930s. The Stratemeyer Syndicate was well known for publishing acclaimed fictional book series, including The Rover Boys, Tom Swift, The Hardy Boys, and more.
Stratemeyer's daughter, Harriet, and syndicate writer Mildred Wirt Benson were the two people primarily responsible for bringing the iconic character of Nancy Drew to life in the minds and hearts of millions of young readers around the world. As the heroine of the detective series, Nancy, the daughter of district attorney Carson Drew, solves crimes with her resourcefulness and knowledge of human character. Nancy Drew was the first and most consistent heroine for many schoolgirls. The young adult novels were created in 1929 and are still in print with over 175 volumes. More than 200 million Nancy Drew books were sold by the end of the 20th century.
The teen detective reached a new generation of fans with The Lost Files of Nancy Drew (2007), also written under the name Carolyn Keene. The Lost Files is an interactive book with pop-out guides, a will, maps, and more. In addition, the feature film Nancy Drew was released in 2007.