The Hardy Boys: Undercover Brothers is a detective fiction series of books published by Aladdin Paperbacks (an imprint of Simon & Schuster), which replaced The Hardy Boys Digest paperbacks in early 2005. All the books in the series have been written under the pen name of Franklin W. Dixon.

Series background

The Undercover Brothers is about two teenage brother detectives, Frank and Joe Hardy, who are the sons of world-famous PI Fenton Hardy. Although there are many similarities in this series to the previous Hardy Boys series, there are also many changes, for example:

Regular series

Trilogy series

Undercover Brothers Super Mysteries

The Hardy Boys Secret Files

The Hardy Boys Secret Files is a series begun in 2010 by the publisher Simon & Schuster under their Aladdin imprint. It features the Hardy Boys, Frank and Joe, as grade-school detectives. Three new titles are published yearly as paperback books and eBooks. This series ended in 2015 and was replaced by the Hardy Boys Clue Book series.

Nancy Drew and the Hardy Boys Super Mystery

A crossover spin-off series with the Nancy Drew: Girl Detective series. The stories are told in the first person, alternating chapters between Frank's or Joe's and Nancy's perspective. The first title in the series acts as an introduction between the characters. This series published one title per year until the end of the Girl Detective and Undercover Brothers series in 2012.

Graphic novels

In the spring of 2005, NBM launched its new imprint, Papercutz, with the publication of two three-part comic book series; Nancy Drew (The Demon of River Heights) and The Hardy Boys (The Ocean of Osyria). After the completion of both series, The Demon of River Heights series and The Ocean of Osyria series were both collected into 92 pages graphic novels, becoming the first titles in the Nancy Drew graphic novel series and the Hardy Boys graphic novel series respectively. All other titles in both series have been made in graphic novel format only and are published every three months.

List of graphic novels series titles

When Chet Morton's Internet account is hacked into and used to bid on a stolen artifact, the Ocean of Osyria, best friends Frank and Joe Hardy, with girlfriends Callie Shaw and Iola Morton, head to Osyria, the location of the auction, to clear Chet's name. The brothers investigate a very strange mystery about a popular, wealthy teenage girl's stolen identity. The brothers and a few foreign shoppers are locked up in Bayport's new shopping mall deliberately by a mysterious man who sabotaged the mall with many traps. The 'prisoners' must struggle to survive together, find a way to escape, and find and stop the man with a few ATAC gadgets the brothers have before it is too late. The brothers must figure out who is trying to kill the competition at a skateboard tournament. The boys head to a drama competition for high school students to snoop out a sabotager wanting to win the tournament. The Hardy Boys have to rescue an agent's son or they will be dead! The brothers head to a stunt competition to work with Lindsay Rider... as backup! When Haley's Internet friends start disappearing in real life, the boys decide to help out.