The Mystery of the Spiral Bridge
Franklin W. Dixon
The Hardy Boys Mystery Stories (45)
The Secret Agent on Flight
The Hardy Boys Mystery Stories (46)
Mystery of the Whale Tattoo
The Hardy Boys Mystery Stories (47)
The Arctic Patrol Mystery
The Hardy Boys Mystery Stories (48)
The Bombay Boomerang
The Hardy Boys Mystery Stories (49)
The Masked Monkey
The Hardy Boys Mystery Stories (50)
Danger on Vampire Trail
The Shattered Helmet
The Hardy Boys Mystery Stories (52)
The Clue of the Hissing Serpent
The Hardy Boys Mystery Stories (53)
The Mysterious Caravan
The Hardy Boys Mystery Stories (54)
The Witchmaster's Key
The Hardy Boys Mystery Stories (55)
The Jungle Pyramid
The Hardy Boys Mystery Stories (56)
The Firebird Rocket
The Hardy Boys Mystery Stories (57)
The Sting of the Scorpion
The Hardy Boys Mystery Stories (58)
Night of the Werewolf
The Hardy Boys Mystery Stories (59)
Mystery of the Samurai Sword
The Hardy Boys Mystery Stories (60)
The Pentagon Spy
The Hardy Boys Mystery Stories (61)
The Apeman's Secret
The Hardy Boys Mystery Stories (62)
The Mummy Case
The Hardy Boys Mystery Stories (63)
Mystery of Smugglers Cove
The Hardy Boys Mystery Stories (64)
The Stone Idol
The Hardy Boys Mystery Stories (65)
The Vanishing Thieves
The Hardy Boys Mystery Stories (66)
The Outlaw's Silver
The Hardy Boys Mystery Stories (67)
The Submarine Caper
The Hardy Boys Mystery Stories (68)
The Four-Headed Dragon
The Hardy Boys Mystery Stories (69)
The Infinity Clue
The Hardy Boys Mystery Stories (70)
Track of the Zombie
The Hardy Boys Mystery Stories (71)
The Voodoo Plot
The Hardy Boys Mystery Stories (72)
The Billion Dollar Ransom
The Hardy Boys Mystery Stories (73)
Tic-Tac-Terror
The Hardy Boys Mystery Stories (74)
Trapped at Sea
The Hardy Boys Mystery Stories (75)
Game Plan for Disaster
The Hardy Boys Mystery Stories (76)
The Crimson Flame
The Hardy Boys Mystery Stories (77)
Cave-In
The Hardy Boys Mystery Stories (78)
Sky Sabotage
The Hardy Boys Mystery Stories (79)
The Roaring River Mystery
The Hardy Boys Mystery Stories (80)
The Demon's Den
The Hardy Boys Mystery Stories (81)
The Blackwing Puzzle
The Hardy Boys Mystery Stories (82)
The Swamp Monster
The Hardy Boys Mystery Stories (83)
Revenge of the Desert Phantom
The Hardy Boys Mystery Stories (84)
The Skyfire Puzzle
The Hardy Boys Mystery Stories (85)
The Mystery of the Silver Star
The Hardy Boys Mystery Stories (86)
Program for Destruction
The Hardy Boys Mystery Stories (87)
Tricky Business
The Hardy Boys Mystery Stories (88)
The Sky Blue Frame
The Hardy Boys Mystery Stories (89)
Danger on the Diamond
The Hardy Boys Mystery Stories (90)
Shield of Fear
The Hardy Boys Mystery Stories (91)
The Shadow Killers
The Hardy Boys Mystery Stories (92)
The Serpent's Tooth Mystery
The Hardy Boys Mystery Stories (93)
Breakdown in Axeblade
The Hardy Boys Mystery Stories (94)
Danger On The Air
The Hardy Boys Mystery Stories (95)
Wipeout
The Hardy Boys Mystery Stories (96)
Cast of Criminals
The Hardy Boys Mystery Stories (97)
Spark of Suspicion
The Hardy Boys Mystery Stories (98)
Dungeon of Doom
The Hardy Boys Mystery Stories (99)
The Secret of the Island Treasure
The Hardy Boys Mystery Stories (100)
The Money Hunt
The Hardy Boys Mystery Stories (101)
Terminal Shock
The Hardy Boys Mystery Stories (102)
The Million-Dollar Nightmare
The Hardy Boys Mystery Stories (103)
Tricks of the Trade
The Hardy Boys Mystery Stories (104)