Hardy Detective Agency - Fan site with information about the books and Hardy Boys fan fiction. - http://www.hardydetectiveagency.com
Gary's Hardy Boys Books - Includes biography of Franklin W. Dixon, canon overview, message board, and a list of collected editions. - http://www.win.net/~bayport/booklist.html
Stratemeyer Syndicate: The Hardy Boys - Article discussing Edward Stratemeyer, his publishing syndicate, and the origins and development of the series. Includes cover art, adaptations in other media, and appraisals information. - http://www.keeline.com/Stratemeyer.html
Who Wrote the Hardy Boys? - Discusses the individuals who outlined, wrote, edited, and revised each book in the series under the collective pen name of Franklin W. Dixon. [PDF Format] - http://www.keeline.com/Hardy_Boys.pdf
SkyWarp's Hardy Boys Casefiles - Focuses on the Casefiles series. Includes cover scans, character appearances, locations guide, organization profiles, forums, book summaries, wallpaper, and site updates. - http://www.hardyboyscasefiles.com/