66 books • 5 series
Hardy Boys Undercover Brothers #1-8 Boxed Set 1
The Vanishing Thieves (Hardy Boys (eBook), #66)
The Stone Idol (Hardy Boys (eBook), #65)
Mystery of Smugglers Cove (Hardy Boys (eBook), #64)
The Pentagon Spy (Hardy Boys (eBook), #61)
Night of the Werewolf (Hardy Boys (eBook), #59)
The Apeman's Secret (Hardy Boys (eBook), #62)
Hardy Boys Prepack #1-#6
Hardy Boys Prepack #13-#18 (Na)
Hardy Boys Prepack #19-#24 (Na)
Hardy Boys Prepack #25-#30 (Na)
Hardy Boys Prepack #31-#36 (Na)
Hardy Boys Prepack #7-#12 (Na)
Hardy Boys Prepack #53-#58 (Na)
Hardy Boys Prepack #43-#48 (Na)
Hardy Boys Prepack #37-#42 (Na)
Hardy Boys Prepack #49-#54 (Na)
The Secret of the Caves (Hardy Boys (Audio), #7)
Hardy Boys Complete Set
Hardy Boys 16c Sidekick
Hardy Boys 7-9
Hardy Boys 4-6
Hardy Boys 1-3
The Hardy Boys: Volumes 4, 5, 6
