| #2 |  The Tower Treasure
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| #3 |  The House on the Cliff
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| #4 |  The Missing Chums
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| #5 |  Hunting for hidden gold
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| #6 |  The great airport mystery
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| #7 |  The Secret of the Caves
|
| #8 |  The Shore Road Mystery
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| #9 |  What Happened at Midnight
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| #10 |  While the Clock Ticked
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| #11 |  The Hidden Harbor Mystery
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| #12 |  Hardy Boys 16: a Figure in Hiding
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| #13 |  The Sinister Sign Post
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| #14 |  The mystery of the disappearing floor.
|
| #15 |  The clue of the broken blade
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| #16 |  Mystery of the Flying Express
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| #17 |  The melted coins
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| #18 |  The Secret Panel
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| #19 |  The Short-Wave Mystery
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| #20 |  The Secret of Skull Mountain
|
| #21 |  The Secret of the Lost Tunnel
|
| #22 |  The Secret of Pirates' Hill
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| #23 |  The Ghost at Skeleton Rock
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| #24 |  The Clue in the Embers
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| #25 |  The mystery of the Chinese junk
|
| #26 |  The Clue of the Screeching Owl
|
| #27 |  The Viking Symbol Mystery
|
| #28 |  The haunted fort
|
| #29 |  The mystery of the spiral bridge
|
| #30 |  The secret agent on Flight 101
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| #31 |  The Witchmaster's Key
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| #32 |  The Mysterious Caravan
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| #33 |  Night of the werewolf
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| #34 |  The Jungle Pyramid
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| #35 |  The Apeman's Secret
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| #36 |  The Mummy Case
|
| #37 |  Mystery of Smugglers Cove
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| #38 |  The Outlaw's Silver
|
| #39 |  Spinners
|
| #40 |  Motherless Brooklyn
|
| #41 |  The Mystic Arts of Erasing All Signs of Death
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| #42 |  The Yiddish Policemen's Union
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| #43 |  Gun Machine
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| #44 |  The Fifth Heart
|
| #45 |  Crooked Little Vein
|
| #46 |  The Complete Sherlock Holmes
|
| #47 |  El Laberinto de los Espíritus
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| #48 |  Slow Motion Ghosts
|
| #49 |  Creeping Jenny Creeping Jenny
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| #50 |  The Album of Dr. Moreau
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| #51 |  Station Eternity
|
