- The Secret of the Old Clock, 1959
- The Hidden Staircase, 1959
- The Bungalow Mystery, 1960
- The Mystery at Lilac Inn, 1961
- The Secret of Shadow Ranch, 1965
- The Secret of Red Gate Farm, 1961
- The Clue in the Diary, 1962
- Nancy's Mysterious Letter, 1968
- The Sign of the Twisted Candles, 1968
- The Password to Larkspur Lane, 1966
- The Clue of the Broken Locket, 1965
- The Message in the Hollow Oak, 1972
- The Mystery of the Ivory Charm, 1974
- The Whispering Statue, 1970
- The Haunted Bridge, 1972
- The Clue of the Tapping Heels, 1969
- The Mystery of the Brass Bound Trunk, 1976
- Mystery of the Moss-Covered Mansion, 1971
- The Quest of the Missing Map, 1969
- The Clue in the Jewel Box, 1972
- The Secret in the Old Attic, 1970
- The Clue in the Crumbling Wall, 1973
- The Mystery of the Tolling Bell, 1973
- The Clue in the Old Album, 1977
- The Ghost of Blackwood Hall, 1967
- The Clue of the Leaning Chimney, 1967
- The Secret of the Wooden Lady, 1967
- The Clue of the Black Keys, 1968
- The Mystery at the Ski Jump, 1968
- The Clue of the Velvet Mask, 1969
- The Ringmaster's Secret, 1974
- The Scarlet Slipper Mystery, 1974
- The Witch Tree Symbol, 1975
- The Hidden Window Mystery, 1975
- The Haunted Showboat, 1957
- The Secret of the Golden Pavilion, 1959
- The Clue in the Old Stagecoach, 1960
- The Mystery of the Fire Dragon, 1961
- The Clue of the Dancing Puppet, 1962
- The Moonstone Castle Mystery, 1963
- The Clue of the Whistling Bagpipes, 1964
- The Phantom of Pine Hill, 1965
- The Mystery of the 99 Steps, 1966
- The Clue in the Crossword Cipher, 1967
- The Spider Sapphire Mystery, 1968
- The Invisible Intruder, 1969
- The Mysterious Mannequin, 1970
- The Crooked Banister, 1971
- The Secret of Mirror Bay, 1972
- The Double Jinx Mystery, 1973
- Mystery of the Glowing Eye, 1974
- The Secret of the Forgotten City, 1975
- The Sky Phantom, 1976
- The Strange Message in the Parchment, 1977
- Mystery of Crocodile Island, 1978
- The Thirteenth Pearl, 1979
sep 22 2013 ∞
oct 18 2013 +