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Secret of Pirates' Hill, The
(Amazon - Alibris)
1927.
House on the Cliff
(Amazon - Alibris)
1927.
Secret of the Old Mill, The
(Amazon - Alibris)
1927.
Tower Treasure, The
(Amazon - Alibris)
1928.
Hunting for Hidden Gold
(Amazon - Alibris)
1928.
Missing Chums, The
(Amazon - Alibris)
1928.
Shore Road Mystery, The
(Amazon - Alibris)
1929.
Mystery of Cabin Island
(Amazon - Alibris)
1929.
Secret of the Caves
(Amazon - Alibris)
1930.
Great Airport Mystery
(Amazon - Alibris)
1931.
What Happened at Midnight
(Amazon - Alibris)
1932.
While the Clock Ticked
(Amazon - Alibris)
1933.
Footprints Under the Window
(Amazon - Alibris)
1934.
Mark on the Door, The
(Amazon - Alibris)
1935.
Hidden Harbor Mystery, The
(Amazon - Alibris)
1936.
Sinister Sign Post, The
(Amazon - Alibris)
1937.
Figure in Hiding
(Amazon - Alibris)
1938.
Secret Warning
(Amazon - Alibris)
1939.
Twisted Claw, The
(Amazon - Alibris)
1940.
Disappearing Floor
(Amazon - Alibris)
1941.
Mystery of the Flying Express
(Amazon - Alibris)
1942.
Clue of the Broken Blade, The
(Amazon - Alibris)
1943.
Flickering Torch Mystery, The
(Amazon - Alibris)
1944.
Melted Coins, The
(Amazon - Alibris)
1945.
Phantom Freighter, The
(Amazon - Alibris)
1945.
Short-Wave Mystery
(Amazon - Alibris)
1946.
Secret Panel, The
(Amazon - Alibris)
1948.
Secret of Skull Mountain, The
(Amazon - Alibris)
1949.
Sign of the Crooked Arrow, The
(Amazon - Alibris)
1950.
Secret of the Lost Tunnel, The
(Amazon - Alibris)
1951.
Wailing Siren Mystery, The
(Amazon - Alibris)
1952.
Secret of Wildcat Swamp, The
(Amazon - Alibris)
1953.
Crisscross Shadow, The
(Amazon - Alibris)
1953.
Yellow Feather Mystery, The
(Amazon - Alibris)
1956.
Clue in the Embers, The
(Amazon - Alibris)
1957.
Ghost at Skeleton Rock
(Amazon - Alibris)
1959.
Mystery at Devil's Paw
(Amazon - Alibris)
1959.
Mystery of the Chinese Junk
(Amazon - Alibris)
1960.
Mystery of the Desert Giant
(Amazon - Alibris)
1962.
Clue of the Screeching
(Amazon - Alibris)
1963.
Viking Symbol Mystery
(Amazon - Alibris)
1964.
Mystery of the Aztec Warrior
(Amazon - Alibris)
1965.
Haunted Fort, The
(Amazon - Alibris)
1966.
Mystery of the Spiral Bridge
(Amazon - Alibris)
1967.
Secret Agent on Flight 101
(Amazon - Alibris)
1969.
Arctic Patrol Mystery, The
(Amazon - Alibris)
1970.
Bombay Boomerang, The
(Amazon - Alibris)
1971.
Danger on Vampire Trail
(Amazon - Alibris)
1972.
Masked Monkey, The
(Amazon - Alibris)
1973.
Shattered Helmet, The
(Amazon - Alibris)
1975.
Clue of the Hissing Serpent, The
(Amazon - Alibris)
1975.
Hooded Hawk Mystery, The
(Amazon - Alibris)
1975.
Mysterious Caravan, The
(Amazon - Alibris)
1975.
Mystery of the Whale Tattoo, The
(Amazon - Alibris)
1976.
Witchmaster's Key, The
(Amazon - Alibris)
1977.
Firebird Rocket
(Amazon - Alibris)
1977.
Jungle Pyramid, The
(Amazon - Alibris)
1979.
Mystery of The Samurai Sword, The
(Amazon - Alibris)
1979.
Night of the Werewolf
(Amazon - Alibris)
1979.
Sting of the Scorpion, The
(Amazon - Alibris)
1980.
Apeman's Secret, The
(Amazon - Alibris)
1980.
Mummy Case, The
(Amazon - Alibris)
1980.
Mystery Smugglers Cove
(Amazon - Alibris)
1980.
Pentagon Spy, The
(Amazon - Alibris)
1981.
Four Headed Dragon, The
(Amazon - Alibris)
1981.
Infinity Clue
(Amazon - Alibris)
1981.
Outlaw's Silver
(Amazon - Alibris)
1981.
Stone Idol, The
(Amazon - Alibris)
1981.
Submarine Caper
(Amazon - Alibris)
1981.
Vanishing Thieves
(Amazon - Alibris)
1982.
Billion Dollar Ransom, The
(Amazon - Alibris)
1982.
Game Plan for Disaster
(Amazon - Alibris)
1982.
Tarck Zombies
(Amazon - Alibris)
1982.
Tic-Tac Terror
(Amazon - Alibris)
1982.
Trapped Sea
(Amazon - Alibris)
1982.
Voodoo Plot, The
(Amazon - Alibris)
1983.
Cave in Hardy Boys
(Amazon - Alibris)
1983.
Crimson Flame
(Amazon - Alibris)
1983.
Roaring River
(Amazon - Alibris)
1983.
Sky Sabotage
(Amazon - Alibris)
1984.
Blackwing Puzzle, The
(Amazon - Alibris)
1984.
Demon's Den, The
(Amazon - Alibris)
1984.
Hardy Boys Ghost Stories, The
(Amazon - Alibris)
1984.
Swamp Monster
(Amazon - Alibris)
1985.
Revenge of the Desert Phantom
(Amazon - Alibris)
1985.
Skyfire Puzzle, The
(Amazon - Alibris)
1987.
Crowning Terror, The
(Amazon - Alibris)
1987.
Cult of Crime
(Amazon - Alibris)
1987.
Dead on Target
(Amazon - Alibris)
1987.
Deathgame
(Amazon - Alibris)
1987.
Edge of Destruction, The
(Amazon - Alibris)
1987.
Evil, Inc
(Amazon - Alibris)
1987.
Genius Thieves, The
(Amazon - Alibris)
1987.
Hostages of Hate
(Amazon - Alibris)
1987.
Lazarus Plot, The
(Amazon - Alibris)
1987.
Mystery of The Silver Star
(Amazon - Alibris)
1987.
Program For Destruction
(Amazon - Alibris)
1987.
See No Evil
(Amazon - Alibris)
1988.
Blood Relations
(Amazon - Alibris)
1988.
Borgia Dagger, The
(Amazon - Alibris)
1988.
Brother Against Brother
(Amazon - Alibris)
1988.
Danger on The Diamond
(Amazon - Alibris)
1988.
Double Exposure
(Amazon - Alibris)
1988.
Killing in the Market, A
(Amazon - Alibris)
1988.
Line of Fire
(Amazon - Alibris)
1988.
Nightmare in Angel City
(Amazon - Alibris)
1988.
Number File, The
(Amazon - Alibris)
1988.
Perfect Getaway
(Amazon - Alibris)
1988.
Serpent's Tooth Mystery, The
(Amazon - Alibris)
1988.
Shadow Killers
(Amazon - Alibris)
1988.
Shield of Fear
(Amazon - Alibris)
1988.
Sky Blue Frame, The
(Amazon - Alibris)
1988.
Street Spies
(Amazon - Alibris)
1988.
Too Many Traitors
(Amazon - Alibris)
1988.
Witness to Murder
(Amazon - Alibris)
1989.
Blood Money
(Amazon - Alibris)
1989.
Borderline Case, The
(Amazon - Alibris)
1989.
Breakdown In Axeblade
(Amazon - Alibris)
1989.
Cast of Criminals
(Amazon - Alibris)
1989.
Collision Course
(Amazon - Alibris)
1989.
Countdown to Terror
(Amazon - Alibris)
1989.
Danger on The Air
(Amazon - Alibris)
1989.
Deadliest Dare, The
(Amazon - Alibris)
1989.
Disaster for Hire
(Amazon - Alibris)
1989.
Dungeon of Doom
(Amazon - Alibris)
1989.
Final Cut
(Amazon - Alibris)
1989.
Ghost Stories
(Amazon - Alibris)
1989.
Nowhere to Run
(Amazon - Alibris)
1989.
Scene of Crime
(Amazon - Alibris)
1989.
Spark of Suspicion
(Amazon - Alibris)
1989.
Thick As Thieves
(Amazon - Alibris)
1989.
Tricky Business
(Amazon - Alibris)
1989.
Trouble in the Pipeline
(Amazon - Alibris)
1989.
Wipeout
(Amazon - Alibris)
1989.
Without a Trace
(Amazon - Alibris)
1990.
Castle Fear
(Amazon - Alibris)
1990.
Danger Zone
(Amazon - Alibris)
1990.
Dead Season, The
(Amazon - Alibris)
1990.
Diplomatic Deceit
(Amazon - Alibris)
1990.
Flesh and Blood
(Amazon - Alibris)
1990.
Foul Play
(Amazon - Alibris)
1990.
Fright Wave
(Amazon - Alibris)
1990.
Highway Robbery
(Amazon - Alibris)
1990.
In Self-Defense
(Amazon - Alibris)
1990.
Last Laugh
(Amazon - Alibris)
1990.
Million Dollar Nightmare
(Amazon - Alibris)
1990.
Money Hunt, The
(Amazon - Alibris)
1990.
Running on Empty
(Amazon - Alibris)
1990.
Secret of The Island Treasure, The
(Amazon - Alibris)
1990.
Smoke Screen Mystery, The
(Amazon - Alibris)
1990.
Strategic Moves
(Amazon - Alibris)
1990.
Terminal Shock
(Amazon - Alibris)
1990.
Tricks of the Trade
(Amazon - Alibris)
1991.
Attack of the Video Villians
(Amazon - Alibris)
1991.
Beyond The Law
(Amazon - Alibris)
1991.
Choke Hold
(Amazon - Alibris)
1991.
Deep Trouble
(Amazon - Alibris)
1991.
Dirty Deeds
(Amazon - Alibris)
1991.
Fear on Wheels
(Amazon - Alibris)
1991.
Flight Into Danger
(Amazon - Alibris)
1991.
Height of Danger
(Amazon - Alibris)
1991.
Panic on Gull Island
(Amazon - Alibris)
1991.
Power Play
(Amazon - Alibris)
1991.
Prime-Time, The
(Amazon - Alibris)
1991.
Rock N Revenge
(Amazon - Alibris)
1991.
Secret of Sigma Seven
(Amazon - Alibris)
1991.
Spiked!
(Amazon - Alibris)
1991.
Terror on Track
(Amazon - Alibris)
1991.
Three Ring Terror
(Amazon - Alibris)
1991.
Uncivil War
(Amazon - Alibris)
1991.
Web of Horror
(Amazon - Alibris)
1992.
Baseball Card Conspiracy
(Amazon - Alibris)
1992.
Case of The Counterfeit Criminals
(Amazon - Alibris)
1992.
Cold Sweat
(Amazon - Alibris)
1992.
Deadfall
(Amazon - Alibris)
1992.
Demolition Mission, The
(Amazon - Alibris)
1992.
Endangered Species
(Amazon - Alibris)
1992.
Final Gambit
(Amazon - Alibris)
1992.
Grave Danger
(Amazon - Alibris)
1992.
Lethal Cargo
(Amazon - Alibris)
1992.
Mayhem in Motion
(Amazon - Alibris)
1992.
No Mercy
(Amazon - Alibris)
1992.
Open Season
(Amazon - Alibris)
1992.
Phoenix Equation
(Amazon - Alibris)
1992.
Radical Moves
(Amazon - Alibris)
1992.
Rigged For Revenge
(Amazon - Alibris)
1992.
Rock 'n' Roll Renegades
(Amazon - Alibris)
1992.
Rough Riding
(Amazon - Alibris)
1992.
Sabotage at Sports City
(Amazon - Alibris)
1993.
Bad Rap
(Amazon - Alibris)
1993.
Carnival of Crime
(Amazon - Alibris)
1993.
Case of the Cosmic Kidnapping, The
(Amazon - Alibris)
1993.
Danger in The Fourth Dimension
(Amazon - Alibris)
1993.
Danger Unlimited
(Amazon - Alibris)
1993.
Dead of Night
(Amazon - Alibris)
1993.
Mystery in the Old Mine, The
(Amazon - Alibris)
1993.
No Way Out
(Amazon - Alibris)
1993.
Pacific Conspiration, The
(Amazon - Alibris)
1993.
Poisoned Paradise
(Amazon - Alibris)
1993.
Real Horror
(Amazon - Alibris)
1993.
Road Pirates
(Amazon - Alibris)
1993.
Robots's Revenge
(Amazon - Alibris)
1993.
Screamers
(Amazon - Alibris)
1993.
Sheer Terror
(Amazon - Alibris)
1993.
Survival Run
(Amazon - Alibris)
1993.
Tagged for Terror
(Amazon - Alibris)
1993.
Trouble at Coyote Canyon
(Amazon - Alibris)
1994.
Darkness Falls
(Amazon - Alibris)
1994.
Day of The Dinosaur
(Amazon - Alibris)
1994.
Dead Man in Deadwood
(Amazon - Alibris)
1994.
Deadly Engagement
(Amazon - Alibris)
1994.
False Alarm
(Amazon - Alibris)
1994.
Hot Wheels
(Amazon - Alibris)
1994.
Inferno of Fear
(Amazon - Alibris)
1994.
Mission: Mayhem
(Amazon - Alibris)
1994.
Mystery on Makatunk Island
(Amazon - Alibris)
1994.
Mystery with a Dangerous Beat
(Amazon - Alibris)
1994.
Racing to Disaster
(Amazon - Alibris)
1994.
Reel Thrills
(Amazon - Alibris)
1994.
Sabotage At Sea
(Amazon - Alibris)
1994.
Taste For Terror, A
(Amazon - Alibris)
1994.
Toxic revenge
(Amazon - Alibris)
1994.
Treasure At Dolphin Bay, The
(Amazon - Alibris)
1994.
Virtual Villainy
(Amazon - Alibris)
1994.
Winner Take All
(Amazon - Alibris)
1995.
Against All Odds
(Amazon - Alibris)
1995.
Compaign of Crime
(Amazon - Alibris)
1995.
Crime in the Kennel
(Amazon - Alibris)
1995.
Cross Country Crime
(Amazon - Alibris)
1995.
Crusade of The Flaming Sword, The
(Amazon - Alibris)
1995.
Frame Up
(Amazon - Alibris)
1995.
Hypersonic Secret, The
(Amazon - Alibris)
1995.
Illegal Procedure
(Amazon - Alibris)
1995.
Law of the Jungle
(Amazon - Alibris)
1995.
Maximum Challenge
(Amazon - Alibris)
1995.
Murder by Magic
(Amazon - Alibris)
1995.
Peak of Danger
(Amazon - Alibris)
1995.
Pure Evil
(Amazon - Alibris)
1995.
Sdetracked To Danger
(Amazon - Alibris)
1995.
Shock Jock
(Amazon - Alibris)
1995.
True Thriller
(Amazon - Alibris)
1995.
Wild Wheels
(Amazon - Alibris)
1995.
Wrong Side of The Law
(Amazon - Alibris)
1996.
Acting Up
(Amazon - Alibris)
1996.
Alaskan Adventure, The
(Amazon - Alibris)
1996.
Bad Chemistry
(Amazon - Alibris)
1996.
Blood Sport
(Amazon - Alibris)
1996.
Blown Away
(Amazon - Alibris)
1996.
Cave Trap
(Amazon - Alibris)
1996.
Clean Sweep
(Amazon - Alibris)
1996.
Cliff Hanger
(Amazon - Alibris)
1996.
Cold Cash Caper, The
(Amazon - Alibris)
1996.
Competitive Edge
(Amazon - Alibris)
1996.
Desert Thieves, The
(Amazon - Alibris)
1996.
Fast Break
(Amazon - Alibris)
1996.
Hight Speed Showdown
(Amazon - Alibris)
1996.
Last Leap, The
(Amazon - Alibris)
1996.
Moment of Truth
(Amazon - Alibris)
1996.
Search for the Snow Leopard, The
(Amazon - Alibris)
1996.
Sky Hight
(Amazon - Alibris)
1996.
Slam Dunk Sabotage
(Amazon - Alibris)
1997.
Absolute Zero
(Amazon - Alibris)
1997.
Emporer's Shield, The
(Amazon - Alibris)
1997.
First Day Worst Day
(Amazon - Alibris)
1997.
Gross Ghost Mystey, The
(Amazon - Alibris)
1997.
High Wire Act
(Amazon - Alibris)
1997.
Karate Clue
(Amazon - Alibris)
1997.
Lost in Gator Swamp
(Amazon - Alibris)
1997.
Mark of The Blue Tattoo, The
(Amazon - Alibris)
1997.
River Rats
(Amazon - Alibris)
1997.
Secret of Skeleton Reef, The
(Amazon - Alibris)
1997.
Stress Point
(Amazon - Alibris)
1997.
Survival of The Fittest
(Amazon - Alibris)
1997.
Terror At Night Tide
(Amazon - Alibris)
1997.
Vikings Revenge, The
(Amazon - Alibris)
1998.
Abracadabra Case, The
(Amazon - Alibris)
1998.
Chase For The Mystery Twister, The
(Amazon - Alibris)
1998.
Crisscross Crime, The
(Amazon - Alibris)
1998.
Danger In The Extreme
(Amazon - Alibris)
1998.
Dead in The Water
(Amazon - Alibris)
1998.
Dinosaur Disaster, The
(Amazon - Alibris)
1998.
Doggone Detectives, The
(Amazon - Alibris)
1998.
eye on Crime
(Amazon - Alibris)
1998.
Ice Cold Case, The
(Amazon - Alibris)
1998.
Jump Shot Detectives
(Amazon - Alibris)
1998.
Pumped-up Pizza Problem, the
(Amazon - Alibris)
1998.
Rocky Road to Revenge, The
(Amazon - Alibris)
1998.
Trial and Terror
(Amazon - Alibris)
1998.
Walking Snowman, The
(Amazon - Alibris)
1998.
Who Took The Book?
(Amazon - Alibris)
1999.
All Eyes on First Prize
(Amazon - Alibris)
1999.
Caribbean Cruise, The
(Amazon - Alibris)
1999.
Daredevils
(Amazon - Alibris)
1999.
Fire in the Sky
(Amazon - Alibris)
1999.
Giant Rat of Sumatra
(Amazon - Alibris)
1999.
Hunt For Four Brothers, The
(Amazon - Alibris)
1999.
King For A Day
(Amazon - Alibris)
1999.
London Deception, The
(Amazon - Alibris)
1999.
Lure of the Italian Treasure, The
(Amazon - Alibris)
1999.
Monster in The Lake, The
(Amazon - Alibris)
1999.
Pirates Ahoy!:
(Amazon - Alibris)
1999.
Slip, Slide, and Slap Shot
(Amazon - Alibris)
1999.
Will to Survive, A
(Amazon - Alibris)
2000.
Bike Race Ruckus, The
(Amazon - Alibris)
2000.
End of the Trail, The
(Amazon - Alibris)
2000.
Fish-Faced Mask of Mystery, The
(Amazon - Alibris)
2000.
Game Called Chaos, A
(Amazon - Alibris)
2000.
Skin And Bones
(Amazon - Alibris)
2000.
Spy That Never Lies, The
(Amazon - Alibris)
2000.
Training for Trouble
(Amazon - Alibris)
2001.
Castle Conundrum
(Amazon - Alibris)
2001.
Crime In The Cards
(Amazon - Alibris)
2001.
Ghost of a Chance
(Amazon - Alibris)
2001.
Kickoff to Danger
(Amazon - Alibris)
2001.
Past and Present Danger
(Amazon - Alibris)
2001.
Trouble Times Two
(Amazon - Alibris)
2002.
Hardy Boys' Guide to Life, The
(Amazon - Alibris)
2002.
Hide-and-Sneak
(Amazon - Alibris)
2002.
In Plane Sight
(Amazon - Alibris)
2002.
Speed Times Five
(Amazon - Alibris)
2002.
Test Case, The
(Amazon - Alibris)
2002.
Trick-or-Trouble
(Amazon - Alibris)
2002.
Trouble in Warp Space
(Amazon - Alibris)
2003.
Case of the Psychic's Vision, The
(Amazon - Alibris)
2003.
Double Jeopardy
(Amazon - Alibris)
2003.
Mystery of the Black Rhino, The
(Amazon - Alibris)
2003.
Passport to Danger
(Amazon - Alibris)
2003.
Secret of the Soldier's Gold, The
(Amazon - Alibris)
2003.
Typhoon Island
(Amazon - Alibris)
2004.
Dangerous Transmission, The
(Amazon - Alibris)
2004.
Farming Fear
(Amazon - Alibris)
2004.
Hidden Mountain
(Amazon - Alibris)
2004.
Warehouse Rumble
(Amazon - Alibris)
2004.
Who-Dunnit Book
(Amazon - Alibris)
2004.
Wreck and Roll
(Amazon - Alibris)
2005.
Motocross Madness
(Amazon - Alibris)
2005.
One False Step
(Amazon - Alibris)
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House on the Cliff
Secret of the Old Mill, The
Secret of the Caves
What Happened at Midnight
Footprints Under the Window
Hidden Harbor Mystery, The
Figure in Hiding
Secret Warning
Twisted Claw, The
Disappearing Floor
Melted Coins, The
Short-Wave Mystery
Crisscross Shadow, The
Clue in the Embers, The
Mystery of the Chinese Junk
Clue of the Screeching
Viking Symbol Mystery
Haunted Fort, The
Mystery of the Spiral Bridge
Bombay Boomerang, The
Danger on Vampire Trail
Sting of the Scorpion, The
Dangerous Transmission, The
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