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#1 The Tower Treasure -
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#2 The House on the Cliff
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#3 The Secret of the Old Mill
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#4 The Missing Chums -
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#5 Hunting for Hidden Gold -
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#6 The Shore Road Mystery -
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#7 The Secret of the Caves -
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#8 The Mystery of Cabin Island -
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#9 The Great Airport Mystery -
#10 What Happened at Midnight -
#11 While the Clock Ticked -
#12 Footprints Under the Window -
#13 The Mark on the Door -
#14 The Hidden Harbor Mystery
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#15 The Sinister Sign Post -
#16 A Figure in Hiding -
#17 The Secret Warning -
#18 The Twisted Claw -
#19 The Disappearing Floor -
#20 Mystery of the Flying Express -
#21 The Clue of the Broken Blade -
#22 The Flickering Torch Mystery -
#23 The Melted Coins -
#24 The Short-Wave Mystery -
#25 The Secret Panel -
#26 The Phantom Freighter -
#27 The Secret of Skull Mountain -
#28 The Sign of the Crooked Arrow -
#29 The Secret of the Lost Tunnel -
#30 The Wailing Siren Mystery -
#31 The Secret of Wildcat Swamp -
#32 The Crisscross Shadow -
#33 The Yellow Feather Mystery -
#34 The Hooded Hawk Mystery -
#35 The Clue in the Embers -
#36 The Secret of Pirates' Hill -
#37 The Ghost at Skeleton Rock -
#38 Mystery at Devil's Paw -
#39 The Mystery of the Chinese Junk -
#40 Mystery of the Desert Giant -
#41 The Clue of the Screeching Owl -
#42 The Viking Symbol Mystery -
#43 The Mystery of the Aztec Warrior -
#44 The Haunted Fort -
#45 The Mystery of the Spiral Bridge -
#46 The Secret Agent on Flight 101 -
#47 Mystery of the Whale Tattoo -
#48 The Arctic Patrol Mystery -
#49 The Bombay Boomerang -
#51 The Masked Monkey -
#52 The Shattered Helmet -
#53 The Clue of the Hissing Serpent -
#54 The Mysterious Caravan -
#55 The Witchmaster's Key -
#56 The Jungle Pyramid -
#57 The Firebird Rocket -
#58 The Sting of the Scorpion -
#59 Night of the Werewolf -
#60 Mystery of the Samurai Sword -
#61 The Pentagon Spy -
#62 The Apeman's Secret -
#65 The Stone Idol -
#68 The Submarine Caper -
#69 The Four-Headed Dragon -
#70 The Infinity Clue -
#71 Track of the Zombie -
#78 Cave-In -
#81 The Demon's Den -
#85 The Skyfire Puzzle -
#88 Tricky Business -
#92 The Shadow Killers -
#97 Cast of Criminals -
#100 The Secret of the Island Treasure -
#116 Rock 'N' Roll Renegades -
#128 Day of the Dinosaur -
#134 Cross-Country Crime -
#135 The Hypersonic Secret -
#140 Slam Dunk Sabotage -
#144 The Secret of Skeleton Reef -
#156 A Will to Survive -
#158 The London Deception -
#161 Training for Trouble -
#165 Crime in the Cards -
#168 The Castle Conundrum -
#172 Trouble in Warp Space -
#177 The Case of the Psychic's Vision -
#179 Passport to Danger -
#180 Typhoon Island -
#182 The Secret of the Soldier's Gold -
#183 Warehouse Rumble -
#184 The Dangerous Transmission -
#187 No Way Out
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#190 Motocross Madness