The Mystery of the Aztec Warrior No. 1
1974, Armada Books, 0006908128 ·
The Arctic Patrol Mystery No. 2
1974, Armada Books, 0006908136 ·
Frank, Joe and Chet are off to Iceland to find a sailor in what seems to be a straight-forward insurance case. Then one of the American astronauts on a training mission in the country disappears. A suspense story of the best kind.
The Mystery of the Disappearing Floor No. 5
1961 (Original Story), Sampson Low
1977 (Rewritten Story), Armada Books, 0006909094 ·
The Mystery of the Melted Coins No. 7
1984 (Original Story), Armada Books, 0006923518 ·
The Clue of the Screeching Owl No. 9
1972, Collins, 0001605097 ·
1977, Armada Books, 0006909345 ·
While the Clock Ticked No. 10
1955 (Original Story), Harold Hill
1983 (Rewritten Story), Armada Books, 0006922015 ·
The Twisted Claw No. 11
1959 (Original Story), Sampson Low
1980 (Rewritten Story), Armada Books, 0006909922 ·
The Wailing Siren Mystery No. 12
1966 (Original Story), Sampson Low
1977 (Rewritten Story), Armada Books, 0006910211 ·
The Secret of the Caves No. 13
1953 (Original Story), Harold Hill
1984 (Rewritten Story), Armada Books, 0006923542 ·
The Secret of Pirates’ Hill No. 14
1972 (Original Story), Collins, 0001605143 ·
The Secret of the Old Mill No. 16
1951 (Original Story), Harold Hill
1982 (Rewritten Story), Armada Books, 0006917259 ·
The Shore Road Mystery No. 17
1953 (Original Story), Harold Hill
1984 (Rewritten Story), Armada Books, 0006923704 ·
The Great Airport Mystery No. 18
1953 (Original Story), Harold Hill
1983 (Rewritten Story), Armada Books, 0006922570 ·
The Sign of the Crooked Arrow No. 19
1951 (Original Story), Harold Hill
1978 (Rewritten Story), Armada Books, 0006910394 ·
The Clue in the Embers No. 20
1981 (Original Story), Aramada Books, 0006910408 ·
What Happened at Midnight No. 21
1955 (Original Story), Harold Hill
1985 (Rewritten Story), Armada Books, 0006925243 ·
The Sinister Signpost No. 22
1959 (Original Story), Sampson Low ·
1984 (Rewritten Story), Armada Books, 0006923526 ·
Original Story
...
Rewritten Story
...
Footprints under the Window No. 23
1957 (Original Story), Harold Hill ·
1984 (Rewritten Story), Armada Books, 0006923534 ·
The Crisscross Shadow No. 24
1965 (Original Story), Sampson Low
1984 (Rewritten Story), Armada Books, 0006911455 ·
The Mystery of Cabin Island No. 26
1953 (Original Story), Harold Hill
1976 (Rewritten Story), Armada Books, 0006912141 ·
The Mark on the Door No. 27
1957 (Original Story), Harold Hill
1979 (Rewritten Story), Armada Books, 0006912974 ·
The Yellow Feather Mystery No. 28
1965 (Original Story), Sampson Low
1982 (Rewritten Story), Armada Books, 0006912982 ·
The Hooded Hawk Mystery No. 29
1965 (Original Story), Sampson Low
1984 (Rewritten Story), Armada Books, 0006923755 ·
The Secret Agent on Flight 101 No. 30
The Tower Treasure No. 31
1951 (Original Story), Harold Hill
1982 (Rewritten Story), Armada Books, 000691912X ·
The Mystery of the Missing Friends No. 32
1951 (Original Story), Harold Hill
1974 (Rewritten Story), Collins, 0001605321 ·
1982 (Rewritten Story), Armada Books, 0006920780 ·
The Mystery at Devil’s Paw No. 35
1984 (Rewritten Story), Armada Books, 0006923089 ·
The Ghost at Skeleton Rock No. 36
1964 (Original Story), Sampson Low
1984 (Rewritten Story), Armada Books, 0006923097 ·
The Clue of the Broken Blade No. 37
1963 (Original Story), Sampson Low
1985 (Rewritten Story), Armada Books, 0006925022 ·
The Secret of Wildcat Swamp No. 38
1966 (Original Story), Sampson Low
1985 (Rewritten Story), Armada Books, 0006925030 ·
The Phantom Freighter No. 39
1951 (Original Story), Harold Hill
1985 (Rewritten Story), Armada Books, 0006925081 ·
The Secret of Skull Mountain No. 40
1966 (Original Story), Sampson Low
(Rewritten Story)
The Mysterious Caravan No. 41
Danger on Vampire Trail No. 42
The Bombay Boomerang No. 43
1987, Armada Books, 0006928269 ·
The Masked Monkey No. 44
1987, Armada Books, 0006928277 ·
The Shattered Helmet No. 45
1988, Armada Books, 0006928285 ·
The Clue of the Hissing Serpent No. 46
The Jungle Pyramid No. 47
The Firebird Rocket No. 48
A Figure in Hiding No. 49
1959 (Original Story), Sampson Low
(Rewritten Story)
The Secret Warning No. 50
1959 (Original Story), Sampson Low
1991 (Rewritten Story), Armada Books, 0006928331 ·
The Mystery of the Flying Express No. 51
1961 (Original Story), Sampson Low
1990 (Rewritten Story), Armada Books, 00006936652 ·
The Short-Wave Mystery No. 52
1990 (Rewritten Story), Armada Books, 0006936660 ·
The Secret Panel No. 53
1967 (Original Story), Sampson Low
(Rewritten Story)
The Secret of the Lost Tunnel No. 54
1950 (Original Story), Harold Hill
(Rewritten Story)
The Witchmaster’s Key No. 55
The Sting of the Scorpion No. 56
1991, Armada Books, 0006928390 ·
The Mystery of the Samurai Sword No. 58
1981, Armada Books, 0006918190 ·
1982, HAUM, 0798608420 ·
The Apeman’s Secret No. 60
The Mummy Case No. 61
1982, HAUM, 0798608439 ·
The Mystery of Smugglers Cove No. 62
1982, Armada Books, 0006918239 ·
The Stone Idol No. 63
1983, Armada Books, 0006918247 ·
The Vanishing Thieves No. 64
1982, Armada Books, 0006918255 ·
The Outlaw’s Silver No. 65
1983, Armada Books, 0006918263 ·
1983, HAUM, 0798608557 ·
The Submarine Caper No. 66
1983, Armada Books, 0006918271 ·
1982, HAUM, 0798608552 ·
The Four-Headed Dragon No. 67
1983, Armada Books, 000691828X ·
The Infinity Clue No. 68
1983, Armada Books, 0006918298 ·
Track of the Zombie No. 69
1983, Armada Books, 0006918301 ·
The Voodoo Plot No. 70
1983, Armada Books, 000691831X ·
The Billion Dollar Ransom No. 71
1984, Armada Books, 0006918328 ·
The Tic-Tac Terror No. 72
Trapped at Sea No. 73
1984, Armada Books, 0006918344 ·
Game Plan for Disaster No. 74
1985, Armada Books, 0006918352 ·
The Crimson Flame No. 75
1984, Armada Books, 0006918360 ·
Cave-In No. 76
Sky Sabotage No. 77
1985, Armada Books, 0006921663 ·
The Roaring River Mystery No. 78
1985, Armada Books, 0006926339 ·
The Demon’s Den No. 79
The Blackwing Puzzle No. 80
The Swamp Monster No. 81
Revenge of the Desert Phantom No. 82
The Skyfire Puzzle No. 83
1987, Armada Books, 0006921868 ·
The Mystery Of The Silver Star No. 84
Programme For Destruction No. 85
The Sky Blue Frame No. 86
Danger On The Diamond No. 87
Other Titles
The House on the Cliff No. 2
1951 (Original Story), Harold Hill
1959 (Rewritten Story), Grosset & Dunlap ·
Tricky Business No. 88
Handbooks
The Hardy Boys Detective Handbook
1979 (Revised Edition), Collins, 0001600680 ·
The Hardy Boys Survival Handbook
1981, Collins, 0001605585
1981, Armada Books, 000691909X ·
Collections
Three Great Hardy Boys Mysteries No. 4
1984, Armada Books, 0006924492 ·
Three Great Hardy Boys Mysteries No. 5
1985, Armada Books, 000692607X ·