Early readers of the Nancy Drew series may be surprised to find the modern version of this spirited sleuth's adventures to be quite different. The character of Nancy Drew, as well as the appearance of the books, has changed over the years in many ways.
The early classic Nancy of the 1930s-1940s is bold, independent, fearless, and capable. With the revisions starting in the 1950s, Nancy is not so outspoken and accepts more help from others making her seem less heroic. Nancy also started traveling throughout the world experiencing exotic adventures and discovering new things; in one adventure she even encounters a flying saucer!
Over the years, several different spin-offs based on the original Nancy Drew character have been created. These include, among others, books aimed towards a younger audience, books that follow Nancy through her experiences in college, a new modern series and even a comic book series.