The Yellow Feather Mystery
Franklin W. Dixon
While the Clock Ticked
What Happened at Midnight
The Wailing Siren Mystery
The Viking Symbol Mystery
The Twisted Claw
The Tower Treasure
The Sinister Signpost
The Sign of the Crooked Arrow
The Short-Wave Mystery
Short (1)
The Shore Road Mystery
The Secret Warning
The Secret Panel
The Secret of Wildcat Swamp
The Secret of the Lost Tunnel
The Secret of the Caves
The Secret of Skull Mountain
The Secret of Pirates' Hill
The Secret Agent on Flight 101
The Phantom Freighter
Mystery of the Flying Express
Mystery of the Desert Giant
The Mystery of the Chinese Junk
The Mystery of Cabin Island
Mystery Map
Mystery at Devil's Paw
The Missing Chums
The Melted Coins
The Mark on the Door
Infinity Clue
Hunting for Hidden Gold
The House on the Cliff
The Hooded Hawk Mystery
The Great Airport Mystery
The Ghost at Skeleton Rock
The Flickering Torch Mystery
The Disappearing Floor
The Crisscross Shadow
The Clue of the Screeching Owl
The Clue of the Broken Blade
The Clue in the Embers
The Arctic Patrol Mystery