Text Box: Hardy Boys Mysteries By: Franklin W. Dixon Text Box: The Tower Treasure The House on the Cliff The Secret of the Old Mill The Missing Chums Hunting for Hidden Gold The Shore Road Mystery The Secret of the Caves The Mystery of Cabin Island Great Airport Mystery What Happened at Midnight While the Clock Ticked Footprints under the Window The Mark on the Door The Hidden Harbor Mystery The Sinister Signpost Figure in Hiding The Secret Warning The Twisted Claw Disappearing Floor The Mystery of the Missing Friends Passport to Danger Mystery of the Flying Express The Clue of the Broken Blade The Flickering Torch Mystery The Melted Coins Short-Wave Mystery The Secret Panel The Phantom Freighter The Secret of Skull Mountain The Sign of the Crooked Arrow The Secret of the Lost Tunnel The Wailing Siren Mystery The Secret of Wildcat Swamp The Crisscross Shadow Text Box: The Yellow Feather Mystery The Hooded Hawk Mystery The Clue in the Embers The Secret of Pirates’ Hill The Ghost at Skeleton Rock Mystery at Devil’s Paw Mystery of the Chinese Junk Mystery of the Desert Giant Clue of the Screeching Owl Viking Symbol Mystery Mystery of the Aztec Warrior The Haunted Fort Mystery of the Spiral Bridge Secret Agent on Flight 101 The Mystery of the Whale Tattoo The Arctic Patrol Mystery The Bombay Boomerang Danger on Vampire Trail The Masked Monkey The Shattered Helmet The Clue of the Hissing Serpent The Mysterious Caravan The Witchmaster’s Key The Jungle Pyramid The Firebird Rocket The Sting of the Scorpion Night of the Werewolf Mystery of the Samurai Sword The Pentagon Spy The Apeman’s Secret The Mummy Case Mystery of Smugglers Cove The Stone Idol The Vanishing Thieves Text Box: The Outlaw’s Silver The Submarine Caper The Four-Headed Dragon The Infinity Clue Track of the Zombie The Voodoo Plot The Billion Dollar Ransom Tic-Tac-Terror Trapped at Sea Game Plan for Disaster The Crimson Flame Cave-in Sky Sabotage The Roaring River Mystery The Demon’s Den The Blackwing Puzzle The Swamp Monster Revenge of the Desert Phantom The Skyfire Puzzle The Mystery of the Silver Star Program for Destruction Tricky Business Sky Blue Frame Danger on the Diamond Shield of Fear Shadow Killers The Serpent’s Tooth Mystery Breakdown in Axeblade Danger on the Air Wipeout Cast of Criminals Spark of Suspicion The Secret of the Treasure