The Hardy Boys (1933–1978)
- Footprints Under the Window (1933)
- The Mark on the Door (1934)
- The Secret Warning (1938)
- The Clue of the Broken Blade (1942)
- The Short-Wave Mystery (1945)
- The Secret of the Lost Tunnel (1950)
- The Wailing Siren Mystery (1951)
- The Secret of Wildcat Swamp (1952)
- The Crisscross Shadow (1953)
- The Yellow Feather Mystery (1954)
- The Hooded Hawk Mystery (1955)
- The Secret of Pirates' Hill (1957)
- The Ghost at Skeleton Rock (1958)
- Mystery at Devil's Paw (1959)
- The Clue of the Screeching Owl (1962)
- The Disappearing Floor (1964)
- The Mystery of the Aztec Warrior (1964)
- The Haunted Fort (1965)
- The Mystery of the Spiral Bridge (1965)
- The Arctic Patrol Mystery (1969)
- The Twisted Claw (1969)
- The Masked Monkey (1972)
- The Shattered Helmet (1973)
- The Clue of the Hissing Serpent (1974)
- The Melted Coins (1975)
- The Mysterious Caravan (1975)
- The Mystery of the Chinese Junk (1975)
- The Secret of Skull Mountain (1975)
- The Witchmaster's Key (1975)
- The Firebird Rocket (1978)