A Game Called Chaos
Franklin W. Dixon
The Hardy Boys (160)
Galaxy X
Hardy Boys: Undercover Brothers (28)
Frame-Up
The Hardy Boys Casefiles (99)
The Four-Headed Dragon
The Hardy Boys (69)
Foul Play
The Hardy Boys Undercover Brothers (19)
Fossil Frenzy
The Hardy Boys: Secret Files (14)
Forever Lost
The Lost Mystery Trilogy (3)
Foreign Exchange
The Hardy Boys Casefiles (25)
The Flickering Torch Mystery
The Hardy Boys (22)
The Firebird Rocket
The Hardy Boys (57)
Final Gambit
The Hardy Boys Casefiles (62)
Final Cut
The Hardy Boys Casefiles (34)
A Figure in Hiding
Franklin W. Dixon & Stratemeyer Stratemeyer Syndicate
The Hardy Boys (16)
Feeding Frenzy
Hardy Boys: Undercover Brothers (20)
Fear on Wheels
The Hardy Boys (108)
Fast Break
The Hardy Boys Casefiles (107)
Farming Fear
The Hardy Boys (188)
Eye on Crime
The Hardy Boys (153)
Extreme Danger
Hardy Boys: Undercover Brothers (1)
Evil, Inc.
The Hardy Boys Casefiles (2)
Endangered Species
The Hardy Boys Casefiles (64)
The End of the Trail
The Hardy Boys (162)
The Emperor's Shield
The Hardy Boys Casefiles (119)
Edge of Destruction
The Hardy Boys Casefiles (5)
Dungeons & Detectives
The Hardy Boys Adventures (19)
Dungeon of Doom
The Hardy Boys (99)
Double Trouble: Book One in the Double Danger Trilogy
Hardy Boys: Undercover Brothers (25)
Double Jeopardy
The Hardy Boys (181)
Double Exposure
The Hardy Boys Casefiles (22)
Double Down: Book Two in the Double Danger Trilogy
Hardy Boys: Undercover Brothers (26)
Double Deception: Book Three in the Double Danger Trilogy
Hardy Boys: Undercover Brothers (27)
Disaster for Hire
The Hardy Boys Casefiles (23)
The Disappearing Floor
The Hardy Boys (19)
The Disappearing Dog
Franklin W. Dixon & Scott Burroughs
The Hardy Boys: Secret Files (7)
The Disappearance
Hardy Boys Adventures (18)
Dirty Deeds
The Hardy Boys Casefiles (49)
The Desert Thieves
The Hardy Boys (141)
Deprivation House: Book One in the Murder House Trilogy
Hardy Boys: Undercover Brothers (22)
The Demon's Den
The Hardy Boys (81)
The Demolition Mission
The Hardy Boys (112)
Deep Trouble
The Hardy Boys Casefiles (54)
Deception on the Set
Hardy Boys Adventures (8)
Deathgame
The Hardy Boys Casefiles (7)
Death and Diamonds
Hardy Boys: Undercover Brothers (15)
The Deadliest Dare
The Hardy Boys Casefiles (30)
Deadfall
The Hardy Boys Casefiles (60)
The Dead Season
The Hardy Boys Casefiles (35)
Dead on Target
The Hardy Boys Casefiles (1)
Dead in the Water
The Hardy Boys Casefiles (127)
Day of the Dinosaur
The Hardy Boys (128)
Darkness Falls
The Hardy Boys Casefiles (89)
Daredevils
The Hardy Boys (159)
The Dangerous Transmission
The Hardy Boys (184)
Danger Zone
The Hardy Boys Casefiles (37)
Danger Unlimited
The Hardy Boys Casefiles (79)
Danger on Vampire Trail
The Hardy Boys (50)
Danger on the Diamond
The Hardy Boys Mystery Stories (90)
Danger on the Air
The Hardy Boys (95)
Danger in the Fourth Dimension
The Hardy Boys (118)
Danger in the Extreme
The Hardy Boys (152)