The Hardy Boys, Frank and Joe Hardy, are fictional characters who appear in various mystery series for children and teens.
The characters were created by American writer Edward Stratemeyer, the founder of the Stratemeyer Syndicate, a book-packaging firm, and the books have been written by many different ghostwriters over the years. The books are published under the collective pseudonym Franklin W. Dixon.
The Hardy Boys have evolved in various ways since their first appearance in 1927. Beginning in 1959, the books were extensively revised, largely to eliminate racial stereotypes. The books were also written in a simpler style in an attempt to compete with television. Some critics argue that in the process, the Hardy Boys changed, becoming more respectful of the law and simultaneously more affluent, "agents of the adult ruling class" and the like. Most, however, saw the updates as an attempt to make the style of the books more modern, while lamenting the loss of the richer pre-war descriptive style. Similar complaints were made about the updates to the comparable girls' series Nancy Drew.
A new Hardy Boys series, the Hardy Boys Casefiles, was created in 1987, and featured murders, violence, and international espionage. The original "Hardy Boys Mystery Stories" series ended in 2005. A new series, Undercover Brothers, was launched the same year, featuring updated versions of the characters who narrate their adventures in the first person. The Undercover Brothers ended in 2012 and was replaced in 2013 by The Hardy Boys Adventures, also narrated in the first person.
Through all these changes, the characters have remained popular. The books sell more than a million copies a year. Several additional volumes are published annually, and the boys' adventures have been translated into more than 25 languages. The Hardy Boys have been featured in computer games and five television shows and used to promote merchandise such as lunchboxes and jeans.