The Missing Money Mystery

Carolyn Keene is the pseudonym of the authors of both the Nancy Drew Mystery Stories (and a spin-off called River Heights) and The Dana Girls Mystery Stories, both produced by the Stratemeyer Syndicate.

A pseudonym for a series of ghostwriters hired by the Stratemeyer Syndicate to write The Hardy Boys and Ted Scott Flying Stories, along with some Nancy Drew crossover stories. [Leslie McFarlane][1] is the most well known of these writers having written the first Hardy Boys book along with twenty others. [1]: http://openlibrary.org/authors/OL1822558A/Leslie_McFarlane