The Hardy Boys

The Hardy Boys, brothers Frank and Joe Hardy, are fictional characters who appear in several mystery series for children and teens. The series revolves around teenagers who are amateur sleuths, solving cases that stumped their adult counterparts. The characters were created by American writer Edward Stratemeyer, the founder of book packaging firm Stratemeyer Syndicate. The books were written by several ghostwriters, most notably Leslie McFarlane, under the collective pseudonym Franklin W. Dixon.

The Hardy Boys have evolved since their debut in 1927. From 1959 to 1973, the first 38 books were extensively revised, largely to remove depictions of ethnic stereotypes; they were also targeted towards younger readers by being rewritten in a simpler, action-oriented style to compete with television.

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. Undercover Brothers ended in 2012 and was replaced in 2013 by The Hardy Boys Adventures, also narrated in the first person.