020 Mystery of the Flying Express
Franklin W. Dixon
041 The Clue of the Screeching Owl
031 The Secret of Wildcat Swamp
023 The Melted Coins
021 The Clue of the Broken Blade
13. The Mark On the Door
035 The Clue in the Embers
09. The Great Airport Mystery
07. The Secret of the Caves
051 The Masked Monkey
024 The Short-Wave Mystery
046 The Secret Agent on Flight 101
043 The Mystery of the Aztec Warrior
049 The Bombay Boomerang
028 The Sign of the Crooked Arrow
055 The Witchmaster's Key
025 The Secret Panel
037 The Ghost at Skeleton Rock
038 Mystery at Devil's Paw
054 The Mysterious Caravan
050 Danger on Vampire Trail
015 The Sinister Signpost
033 The Yellow Feather Mystery
026 The Phantom Freighter
039 The Mystery of the Chinese Junk
044 The Haunted Fort
048 The Arctic Patrol Mystery
053 The Clue of the Hissing Serpent
022 The Flickering Torch Mystery
10. What Happened At Midnight
058 The Sting of the Scorpion
01. The Tower Treasure
030 The Wailing Siren Mystery
029 The Secret of the Lost Tunnel
02. The House On the Cliff
019 The Disappearing Floor
047 Mystery of the Whale Tattoo
052 The Shattered Helmet
06. The Shore Road Mystery
042 The Viking Symbol Mystery
032 The Crisscross Shadow
03. The Secret of the Old Mill
027 The Secret of Skull Mountain
011 While the Clock Ticked
056 The Jungle Pyramid
040 Mystery of the Desert Giant
12. Footprints Under the Window
016 A Figure in Hiding
04. The Missing Chums
045 The Mystery of the Spiral Bridge
036 The Secret of Pirates' Hill
017 The Secret Warning
057 The Firebird Rocket
05. Hunting For Hidden Gold
014 The Hidden Harbor Mystery
08. The Mystery of Cabin Island
018 The Twisted Claw