Carolyn Keene. 64 volumes, including 34 revised titles and 8 reissues. New York: Grosset & Dunlap. Followed by a second series of titles published by Simon & Schuster.
1. The Secret of the Old Clock (1930; Rev. ed. 1959)
2. The Hidden Staircase (1930; Rev. ed. 1959)
3. The Bungalow Mystery (1930; Rev. ed. 1960)
4. The Mystery at Lilac Inn (1930; Rev. ed. 1967)
5. The Secret at Shadow Ranch (1931; Rev. ed. [The Secret of Shadow Ranch] 1965)
6. The Secret of Red Gate Farm (1931; Rev. ed. 1961)
7. The Clue in the Diary (1932; Rev. ed. 1962)
8. Nancy's Mysterious Letter (1932; Rev. ed. 1968)
9. The Sign of the Twisted Candles (1933; Rev. ed. 1968)
10. The Password to Larkspur Lane (1933; Rev. ed. [Password to Larkspur Lane] 1966)
11. The Clue of the Broken Locket (1934; Rev. ed. 1965)
12. The Message in the Hollow Oak (1935; Rev. ed. 1972)
13. The Mystery of the Ivory Charm (1936; Rev. ed. 1974)
14. The Whispering Statue (1937; Rev. ed. 1970)
15. The Haunted Bridge (1937; Rev. ed. 1972)
16. The Clue of the Tapping Heels (1939; Rev. ed. 1969)
17. The Mystery of the Brass-Bound Trunk (1940; Rev. ed. [Mystery of the Brass-Bound Trunk] 1976)
18. The Mystery of the Moss-Covered Mansion (1941; Rev. ed. 1971)
19. The Quest of the Missing Map (1942; Rev. ed. 1969)
20. The Clue in the Jewel Box (1943; Rev. ed. 1972)
21. The Secret in the Old Attic (1944; Rev. ed. 1970)
22. The Clue in the Crumbling Wall (1945; Rev. ed. 1973)
23. The Mystery of the Tolling Bell (1946; Rev. ed. 1973)
24. The Clue in the Old Album (1947; Rev. ed. 1977)
25. The Ghost of Blackwood Hall (1948; Rev. ed. 1967)
26. The Clue of the Leaning Chimney (1949; Rev. ed. 1967)
27. The Secret of the Wooden Lady (1950; Rev. ed. 1967)
28. The Clue of the Black Keys (1951; Rev. ed. 1968)
29. The Mystery at the Ski Jump (1952; Rev. ed. [Mystery at the Ski Jump] 1968)
30. The Clue of the Velvet Mask (1953; Rev. ed. 1969)
31. The Ringmaster's Secret (1953; Rev. ed. 1974)
32. The Scarlet Slipper Mystery (1954; Rev. ed. 1974)
33. The Witch Tree Symbol (1955; Rev. ed. 1975)
34. The Hidden Window Mystery (1956; Rev. ed. 1975)
35. The Haunted Showboat (1957)
36. The Secret of the Golden Pavilion (1959)
37. The Clue in the Old Stagecoach (1960)
38. The Mystery of the Fire Dragon (1961)
39. The Clue of the Dancing Puppet (1962)
40. The Moonstone Castle Mystery (1963)
41. The Clue of the Whistling Bagpipes (1964)
42. The Phantom of Pine Hill (1965)
43. The Mystery of the 99 Steps (1966)
44. The Clue in the Crossword Cipher (1967)
45. The Spider Sapphire Mystery (1968)
46. The Invisible Intruder (1969)
47. The Mysterious Mannequin (1970)
48. The Crooked Bannister (1971)
49. The Secret of Mirror Bay (1972)
50. The Double Jinx Mystery (1973)
51. Mystery of the Glowing Eye (1974)
52. The Secret of the Forgotten City (1975)
53. The Sky Phantom (1976)
54. Strange Message in the Parchment (1977)
55. Mystery of Crocodile Island (1978)
56. The Thirteenth Pearl (1979)
57. The Triple Hoax (2005; originally published by Wanderer Books in 1979)
58. The Flying Saucer Mystery (2005; originally published by Wanderer Books in 1980)
59. The Secret in the Old Lace (2005; originally published by Wanderer Books in 1980)
60. The Greek Symbol Mystery (2005; originally published by Wanderer Books in 1980)
61. The Swami's Ring (2005; originally published by Wanderer Books in 1981)
62. The Kachina Doll Mystery (2005; originally published by Wanderer Books in 1981)
63. The Twin Dilemma (2005; originally published by Wanderer Books in 1981)
64. Captive Witness (2005; originally published by Wanderer Books in 1981)