Danger on the Diamond
Franklin W. Dixon
The Hardy Boys Mystery Stories (90)
Danger on Vampire Trail
The Hardy Boys Mystery Stories (50)
Danger Unlimited
The Hardy Boys Casefiles (79)
Danger Zone
The Hardy Boys Casefiles (37)
The Dangerous Transmission
The Hardy Boys Mystery Stories (184)
Daredevils
The Hardy Boys Mystery Stories (159)
Darkness Falls
The Hardy Boys Casefiles (89)
Day of the Dinosaur
The Hardy Boys Mystery Stories (128)
Dead Man in Deadwood
The Hardy Boys Casefiles (87)
Dead on Target
The Hardy Boys Casefiles (1)
The Dead Season
The Hardy Boys Casefiles (35)
Deadliest Dare
The Hardy Boys Casefiles (30)
Death and Diamonds
The Hardy Boys Undercover Brothers (15)
Deathgame
The Hardy Boys Casefiles (6)
Deception on the Set
The Hardy Boys Adventures (8)
Deep Trouble
The Hardy Boys Casefiles (54)
The Demolition Mission
The Hardy Boys Mystery Stories (112)
The Demon's Den
The Hardy Boys Mystery Stories (81)
Deprivation House
The Hardy Boys Undercover Brothers (22)
The Desert Thieves
The Hardy Boys Mystery Stories (141)
Diplomatic Deceit
The Hardy Boys Casefiles (38)
The Disappearance
The Hardy Boys Adventures (18)
The Disappearing Dog
The Hardy Boys Secret Files (7)
The Disappearing Floor
The Hardy Boys Mystery Stories (19)
Disaster for Hire
The Hardy Boys Casefiles (23)
Double Exposure
The Hardy Boys Casefiles (22)
Double Trouble
The Hardy Boys Undercover Brothers (25)
Dungeon of Doom
The Hardy Boys Mystery Stories (99)
Dungeons & Detectives
The Hardy Boys Adventures (19)
Edge of Destruction
The Hardy Boys Casefiles (4)
The Emperor's Shield
The Hardy Boys Casefiles (119)
The End Of The Trail
The Hardy Boys Mystery Stories (162)
Endangered Species
The Hardy Boys Casefiles (64)
Evil, Inc
The Hardy Boys Casefiles (2)
Extreme Danger
The Hardy Boys Undercover Brothers (1)
Eye On Crime
The Hardy Boys Mystery Stories (153)
Farming Fear
The Hardy Boys Mystery Stories (188)
Fast Break
The Hardy Boys Casefiles (110)
Fear on Wheels
The Hardy Boys Mystery Stories (108)
Feeding Frenzy
The Hardy Boys Undercover Brothers (20)
A Figure in Hiding
The Hardy Boys Mystery Stories (16)
Final Cut
The Hardy Boys Casefiles (34)
Final Gambit
The Hardy Boys Casefiles (62)
Fire in His Blood
The Hardy Boys Casefiles (126)
The Firebird Rocket
The Hardy Boys Mystery Stories (57)
The Flickering Torch Mystery
The Hardy Boys Mystery Stories (22)
Flight Into Danger
The Hardy Boys Casefiles (47)
Footprints Under the Window
The Hardy Boys Mystery Stories (12)
Forever Lost
The Hardy Boys Undercover Brothers (36)
Fossil Frenzy
The Hardy Boys Secret Files (14)
Foul Play
The Hardy Boys Undercover Brothers (19)
The Four-Headed Dragon
The Hardy Boys Mystery Stories (69)
Frame-Up
The Hardy Boys Casefiles (99)
Fright Wave
The Hardy Boys Casefiles (40)
Galaxy X
The Hardy Boys Undercover Brothers (28)
A Game Called Chaos
The Hardy Boys Mystery Stories (160)
Game Plan for Disaster
The Hardy Boys Mystery Stories (76)
The Genius Thieves
The Hardy Boys Casefiles (9)
The Ghost at Skeleton Rock
The Hardy Boys Mystery Stories (37)
The Giant Rat Of Sumatra
The Hardy Boys Mystery Stories (143)