Hardy Boys (Original):

A series of middle grade novels written to appeal to young boys starring two brothers of a famous detective solving their own mysteries.  They were written by serveral people using the pen name Franklin W Dixon.

This series includes the original 38 books starting with The Tower Treasure (1927) and ending with The Mystery at Devil's Paw (1959) and only includes the original versions before they were revised starting in 1959.

For the books in this series I've added the true author to the list (even if this is questionable) along with the psuedonym Franklin W Dixon that is credited on each book.  I have also decided to duplicate the titles for this series and the revised series since the works in this series are sometimes completely different.