British
Angus & Robertson
Blackwing Puzzle
The Submarine Caper
Armada
1 – Aztec Warrior 2
1 – Aztec Warrior 3
1 – Aztec Warrior
2 – Arctic Patrol
3 – Haunted Fort 1990
3 – Haunted Fort
4 – Whale Tattoo 1990
4 – Whale Tattoo
5 – Disappearing Floor 2
5 – Disappearing Floor 1974
5 – Disappearing Floor
6 – Desert Giant 2
6 – Desert Giant 3
6 – Desert Giant
7 – Melted Coins 1974
7 – Melted Coins
8 – Spiral Bridge 2
8 – Spiral Bridge
8 – Spiral Bridge 1992
9 – Screeching Owl 1974
9 – Screeching Owl
10 – While Clock Ticked 1988
10 – While the Clock Ticked
11 – Twisted Claw (2)
11 – Twisted Claw
12 – Wailing Siren
12 – Wailing Siren Mystery 1989
12 – Wailing Siren
13 – Secret of Caves 1987
15 – Flickering Torch
16 – Secret of the Old Mill 1990
17 – Shore Road 2
17 – Shore Road
18 – Great Airport 1981
19 – Crooked Arrow 1975
20 – Clue in Embers 1975
21 – What Happened 1975
22 – Sinister Signpost
22 – Sinister Signpost 1989
22 – Sinister Signpost 1975
23 – Footprints under Window 1976
23 – Footprints under Window
24 – Crisscross Shadow 1976
25 – Hunting for Hidden Gold 1976
25 – Hunting for Hidden Gold 1985
25 – Hidden Gold 1992
26 – Mystery of Cabin Island 1987
26 – Cabin Island
27 – Mark on Door
28 – Yellow Feather 1977
29 – Hooded Hawk
30 – Secret Agent on Flight 101
31 – Tower Treasure
32 – Mystery of Missing Friends
33 – Viking Symbol
34 – Chinese Junk
35 – Devil’s Paw
35 – Devil’s Paw 1993
36 – Skeleton Rock
37 – Broken Blade
38 – Wildcat Swamp
39 – Phantom Freighter
40 – Skull Mountain
41 – Mysterious Caravan
43 – Bombay Boomerang
45 – The Shattered Helmet
46 – Clue of the Hissing Serpent
47 – The Jungle Pyramid
48 – Firebird Rocket 1989
49 – A Figure in Hiding
52 – Short Wave 1990
56 – Sting of Scorpion
57 – Night of the Werewolf 1989
58 – Samurai Sword
58 – The Samurai Sword
60 – Apeman’s Secret
61 – Mummy Case
62 – Smugglers Cove
63 – Stone Idol
64 – Vanishing Thieves
65 – Outlaw’s Silver
66 – The Submarine Caper
67 – Four-Headed Dragon
68 – Infinity Clue
69 – Track of the Zombie
70 – Voodoo Plot
71 – Billion Dollar Ransom
72 – Tic-Tac Terror
73 – Trapped at Sea
75 – Crimson Flame
76 – Cave-in
77 – Sky Sabotage
78 – Roaring River Mystery
79 – The Demon’s Den
80 – Blackwing Puzzle
82 – Revenge of the Desert Phantom
83 – Skyfire Puzzle
84 – Silver Star
99 – Ghost Stories
4 Melted Coins and Spiral Bridge – 2 in 1
Fort and Whale Tattoo – 2 in 1
Signpost Footprints and Coins – 3 in 1
Shore Road, Great Airport, Crooked Arrow
Arctic Patrol, Twisted Claw, Pirates’ Hill
Silver Star, Program for Destruction, Sky Blue Frame (Collins)
Collins
3 – The Haunted Fort
4 – Whale Tattoo
5 – Disappearing Floor
8 – Mystery of the Spiral Bridge
10 – While Clock Ticked
12 – The Wailing Siren Mystery
13 – Secret of Caves
14 – Pirates’ Hill
18 – Great Airport Mystery
20 – Clue in Embers
24 – The Crisscross Shadow
26 – Mystery of Cabin Island
34 – Chinese Junk
36 – Skeleton Rock
52 – The Short-Wave Mystery
55 – The Witchmaster’s Key
56 – Sting of the Scorpion
Rear of a late Collins
Collins Red
Firebird Rocket
Masked Monkey
Mysterious Caravan
Bombay Boomerang
Jungle Pyramid
Diamond
Caves, Pirates Hill, Old Mill
Masked Monkey, Shattered Helmet, Hissing Serpent
Shore Road, Great Airport, Crooked Arrow
Skeleton Rock, Broken Blade, Wildcat Swamp
Clue in Embers, Hooded Hawk, Secret Agent Flight 101
Dragon
Embers, Midnight and Sign Post
Harold Hill
Footprints under the Window
Great Airport
Hidden Harbour
House on the Cliff
Phantom Freighter
Secret of Lost Tunnel
Secret of Old Mill
Secret of the Lost Tunnel 2
Shore Road Mystery
Sign of Crooked Arrow
Trailer for Crooked Arrow
Trailer for Missing Chums
Trailer for Phantom Freighter
What Happened at Midnight
Macdonald
44 – Secret Agent on Flight 101
45 – Secret of Lost Tunnel
Other editions
Annual 1979
Annual 1980
Ghost of the Hardy Boys
Leslie McFarlane
Hardy Boys Survival Handbook
Super-Sleuths
Parragon Books
Jungle Pyramid and Firebird Rocket
Sampson Low
A Figure in Hiding (unnumbered)
Pirates’ Hill error
Sinister Sign Post (unnumbered)
22 – Flickering Torch Mystery
28 – Ghost at Skeleton Rock
Skeleton Rock error
The Secret Warning
43 – Melted Coins
37 – Wailing Siren Mystery
The Twisted Claw
31 – Mystery of the Aztec Warrior
Danish
Bombay Boomerang
House on the Cliff
Dutch
Clue of the Broken Blade
Footprints under the Window 2
Footprints under the Window
Ghost at Skeleton Rock
Hunting for Hidden Gold
Mystery of Cabin Island
Mystery of Desert Giant
Mystery of the Flying Express
Secret of the Old Mill
While the Clock Ticked
Estonian
Case of Counterfeit Criminals
Chase for Mystery Twister
Prime-Time Crime
Finnish
French
Arctic Patrol Mystery
Flickering Torch
Secret of Pirates’ Hill
German
Hissing Serpent
Masked Monkey
Twisted Claw
Wailing Siren
Crisscross Shadow
Icelandic
A Figure in Hiding
Night of the Werewolf
Secret Warning
Italian
Portuguese
Meridiano
Broken Blade
Flying Express
Hidden Gold
House on Cliff
Missing Chums
Secret of Caves
Shore Road
Verbo
1 – House on Cliff
4 – The Missing Chums
While the Clock Ticked
13 – Mark on the Door
16 – Figure in Hiding
Spanish
Hardy Boys ESP
Shore Road Mystery
Hunting for Hidden Gold
Swedish
