1930-1940

1. The Secret of the Old Clock
2. The Hidden Staircase
3. The Bungalow Mystery
4. The Mystery at Lilac Inn
5. The Secret at Shadow Ranch
6. The Secret of Red Gate Farm
7. The Clue in the Diary
8. Nancy’s Mysterious Letter
9. The Sign of the Twisted Candles
10. The Password to Larkspur Lane
11. The Clue of the Broken Locket
12. The Message in the Hollow Oak
13. The Mystery of the Ivory Charm
14. The Whispering Statue
15. The Haunted Bridge
16. The Clue of the Tapping Heels
17. The Mystery of the Brass-Bound Trunk

1941-1950

18. The Mystery at the Moss-Covered Mansion
19. The Quest of the Missing Map
20. The Clue in the Jewel Box
21. The Secret in the Old Attic
22. The Clue in the Crumbling Wall
23. The Mystery of the Tolling Bell
24. The Clue in the Old Album
25. The Ghost of Blackwood Hall
26. The Clue of the Leaning Chimney
27. The Secret of the Wooden lady

1951-1960

28. The Clue of the Black Keys
29. The Mystery at the Ski Jump
30. The Clue of the Velvet Mask
31. The Ringmaster’s Secret
32. The Scarlet Slipper Mystery
33. The Witch Tree Symbol
34. The Hidden Window Mystery
35. The Haunted Showboat
36. The Secret of the Golden Pavilion
37. The Clue in the Old Stagecoach

1961-1970

38. The Mystery of the Fire Dragon
39. The Clue of the Dancing Puppet
40. The Moonstone Castle Mystery
41. The Clue of the Whistling Bagpipes
42. The Phantom of Pine Hill
43. The Mystery of the 99 Steps
44. The Clue in the Crossword Cipher
45. The Spider Sapphire Mystery
46. The Invisible Intruder
47. The Mysterious Mannequin

1971-1980

48. The Crooked Banister
49. The Secret of Mirror Bay
50. The Double Jinx Mystery
51. Mystery of the Glowing Eye
52. The Secret of the Forgotten City
53. The Sky Phantom
54. The Strange Message in the Parchment
55. Mystery of Crocodile Island
56. The Thirteenth Pearl
57. The Triple Hoax
58. The Flying Saucer Mystery
59. The Secret in the Old Lace
60. The Greek Symbol Mystery

1981-1990

61. The Swami’s Ring
62. The Kachina Doll Mystery
63. The Twin Dilemma
64. Captive Witness
65. Mystery of the Winged Lion
66. Race Against Time
67. The Sinister Omen
68. The Elusive Heiress
69. Clue in the Ancient Disguise
70. The Broken Anchor
71. The Silver Cobweb
72. The Haunted Carousel
73. Enemy Match
74. The Mysterious Image
75. The Emerald-Eyed Cat Mystery
76. The Eskimo’s Secret
77. The Bluebeard Room
78. The Phantom ofVenice
79. The Double Horror of Fenley Place
80. The Case of the Disappearing Diamonds
81. The Mardi Gras Mystery
82. The Clue in the Camera
83. The Case of the Vanishing Veil
84. The Joker’s Revenge
85. The Secret of Shady Glen
86. The Mystery of Misty Canyon
87. The Case of the Rising Stars
88. The Search for Cindy Austin
89. The Case of the Disappearing Deejay
90. The Puzzle at Pineview School
91. The Girl Who Couldn’t Remember
92. The Ghost of Craven Cove
93. The Case of the Safecracker’s Secret
94. The Picture-Perfect Mystery
95. The Silent Suspect
96. The Case of the Photo Finish
97. The Mystery of Magnolia Mansion
98. The Haunting of Horse Island

1991-2000

99. The Secret at Seven Rocks
100. A Secret in Time
101. The Mystery of the Missing Millionairess
102. The Secret in the Dark
103. The Stranger in the Shadows
104. The Mystery of the Jade Tiger
105. The Clue in the Antique Trunk
106. The Case of the Artful Crime
107. The Legend of Miner’s Creek
108. The Secret of the Tibetan Treasure
109. The Mystery of the Masked Rider
110. The Nutcracker Ballet Mystery
111. The Secret at Solaire
112. Crime in the Queen’s Court
113. The Secret Lost at Sea
114. The Search for the Silver Persian
115. The Suspect in the Smoke
116. The Case of the Twin Teddy Bears
117. Mystery on the Menu
118. Trouble At Lake Tahoe
119. The Mystery of the Missing Mascot
120. The Case of the Floating Crime
121. The Fortune Teller’s Secret
122. The Message in the Haunted Mansion
123. The Clue on the Silver Screen
124. The Secret of the Scarlet Hand
125. The Teen Model Mystery
126. The Riddle in the Rare Book
127. The Case of the Dangerous Solution
128. Treasure in the Royal Tower
129. The Baby-Sitter Burglaries
130. The Sign of the Falcon
131. The Hidden Inheritance
132. The Fox Hunt Mystery
133. The Mystery at the Crystal Palace
134. The Secret of the Forgotten Cave
135. The Riddle of the Ruby Gazelle
136. The Wedding Day Mystery
137. In Search of the Black Rose
138. The Legend of the Lost Gold
139. The Secret of Candlelight Inn
140. The Door-to-Door Deception
141. The Wild Cat Crime
142. The Case of Capital Intrigue
143. Mystery on Maui
144. The E-mail Mystery
145. The Missing Horse Mystery
146. The Ghost of the Lantern Lady
147. The Case of the Captured Queen
148. On the Trail of Trouble
149. The Clue of the Gold Doubloons
150. Mystery at Moorsea Manor
151. The Chocolate-Covered Contest
152. The Key in the Satin Pocket
153. Whispers In the Fog
154. The Legend of the Emerald Lady
155. The Mystery in Tornado Alley
156. The Secret in the Stars
157. The Music Festival Mystery
158. The Curse of the Black Cat
159. The Secret of the Fiery Chamber
160. The Clue on the Crystal Dove
161. Lost in the Everglades
162. The Case of the Lost Song
163. The Clues Challenge
164. The Mystery of the Mother Wolf
165. The Crime Lab Case

2001-

166. The Case of the Creative Crime
167. Mystery By Moonlight
168. The Bike Tour Mystery
169. The Mistletoe Mystery
170. No Strings Attached
171. Intrigue at the Grand Opera
172. The Riding Club Crime
173. Danger on the Great Lakes
174. A Taste of Danger
175. Werewolf in a Winter Wonderland