The Three Investigators Mystery Series

The Three Investigators Mystery Series
Softcover Cover Art Gallery #1-43

Shown here are just some of the softcover books published in the Three Investigators series.  Please visit this page on another site for detailed information concerning all of the various sets of softcover Three Investigators books.
Hitchcock and Keyhole Softcover Books

The books pictured here are a mixture of the Hitchcock and Keyhole books.

The Secret of Terror Castle
1. The Secret of Terror Castle

The Mystery of the Stuttering Parrot
2. The Mystery of the Stuttering Parrot

The Mystery of the Whispering Mummy
3. The Mystery of the Whispering Mummy
The Mystery of the Green Ghost
4. The Mystery of the Green Ghost

The Mystery of the Vanishing Treasure
5. The Mystery of the Vanishing Treasure
The Secret of Skeleton Island
6. The Secret of Skeleton Island

The Mystery of the Fiery Eye
7. The Mystery of the Fiery Eye

The Mystery of the Silver Spider
8. The Mystery of the Silver Spider

The Mystery of the Screaming Clock
9. The Mystery of the Screaming Clock

The Mystery of the Moaning Cave
10. The Mystery of the Moaning Cave

The Mystery of the Talking Skull
11. The Mystery of the Talking Skull

The Mystery of the Laughing Shadow
12. The Mystery of the Laughing Shadow
The Secret of the Crooked Cat
13. The Secret of the Crooked Cat

The Mystery of the Coughing Dragon
14. The Mystery of the Coughing Dragon
The Mystery of the Flaming Footprints
15. The Mystery of the Flaming Footprints
The Mystery of the Nervous Lion
16. The Mystery of the Nervous Lion

The Mystery of the Singing Serpent
17. The Mystery of the Singing Serpent
The Mystery of the Shrinking House
18. The Mystery of the Shrinking House*
The Mystery of the Flaming Footprints
19. The Secret of Phantom Lake

The Mystery of Monster Mountain
20. The Mystery of Monster Mountain

The Secret of the Haunted Mirror
21. The Secret of the Haunted Mirror

The Mystery of the Dead Man's Riddle
22. The Mystery of the Dead Man's Riddle
The Mystery of the Invisible Dog
23. The Mystery of the Invisible Dog

The Mystery of Death Trap Mine
24. The Mystery of Death Trap Mine

The Mystery of the Dancing Devil
25. The Mystery of the Dancing Devil

The Mystery of the Headless Horse
26. The Mystery of the Headless Horse
The Mystery of the Magic Circle
27. The Mystery of the Magic Circle

The Mystery of the Deadly Double
28. The Mystery of the Deadly Double

The Mystery of the Sinister Scarecrow
29. The Mystery of the Sinister Scarecrow
The Secret of Shark Reef
30. The Secret of Shark Reef

The Mystery of the Scar-Faced Beggar
31. The Mystery of the Scar-Faced Beggar
The Mystery of the Blazing Cliffs
32. The Mystery of the Blazing Cliffs

The Mystery of the Purple Pirate
33. The Mystery of the Purple Pirate

The Mystery of the Wandering Cave Man
34. The Mystery of the Wandering Cave Man
The Mystery of the Kidnapped Whale
35. The Mystery of the Kidnapped Whale
The Mystery of the Missing Mermaid
36. The Mystery of the Missing Mermaid
The Mystery of the Two-Toed Pigeon
37. The Mystery of the Two-Toed Pigeon
The Mystery of the Smashing Glass
38. The Mystery of the Smashing Glass
The Mystery of the Trail of Terror
39. The Mystery of the Trail of Terror

The Mystery of the Rogues' Reunion
40. The Mystery of the Rogues' Reunion
The Mystery of the Creep-Show Crooks
41. The Mystery of the Creep-Show Crooks
The Mystery of Wreckers' Rock
42. The Mystery of Wreckers' Rock

The Mystery of the Cranky Collector
43. The Mystery of the Cranky Collector
The scan for The Mystery of the Shrinking House came from Amazon's product page.
Marchesi Softcover Books
The Secret of Terror Castle
1. The Secret of Terror Castle

The Mystery of the Stuttering Parrot
2. The Mystery of the Stuttering Parrot

The Mystery of the Whispering Mummy
3. The Mystery of the Whispering Mummy
The Secret of Skeleton Island
6. The Secret of Skeleton Island

The Mystery of the Fiery Eye
7. The Mystery of the Fiery Eye

The Mystery of the Silver Spider
8. The Mystery of the Silver Spider

The Mystery of the Screaming Clock
9. The Mystery of the Screaming Clock

The Mystery of the Moaning Cave
10. The Mystery of the Moaning Cave

The Mystery of the Talking Skull
11. The Mystery of the Talking Skull

The Mystery of the Laughing Shadow
12. The Mystery of the Laughing Shadow
The Mystery of the Flaming Footprints
15. The Mystery of the Flaming Footprints
The Mystery of the Shrinking House
18. The Mystery of the Shrinking House
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