THE THREE INVESTIGATORS
1. 
The Mystery of the Green Ghost (Alfred Hitchcock and The Three Investigators, #4)
by:
Robert Arthur
3.83 avg rating — 3,961 ratings 2. 
The Mystery of the Stuttering Parrot (Alfred Hitchcock and The Three Investigators, #2)
by:
Robert Arthur
4.02 avg rating — 5,551 ratings 3. 
The Secret of Terror Castle (Alfred Hitchcock and The Three Investigators, #1)
by:
Robert Arthur
4.05 avg rating — 6,631 ratings 4. 
The Mystery of the Whispering Mummy (Alfred Hitchcock and The Three Investigators, #3)
by:
Robert Arthur
3.85 avg rating — 4,251 ratings 5. 
The Mystery of the Fiery Eye (Alfred Hitchcock and The Three Investigators, #7)
by:
Robert Arthur
3.89 avg rating — 2,657 ratings 6. 
The Mystery of the Vanishing Treasure (Alfred Hitchcock and The Three Investigators, #5)
by:
Robert Arthur
3.87 avg rating — 2,793 ratings 7. 
The Mystery of the Screaming Clock (Alfred Hitchcock and The Three Investigators, #9)
by:
Robert Arthur
3.95 avg rating — 3,432 ratings 8. 
The Mystery of the Silver Spider (Alfred Hitchcock and The Three Investigators, #8)
by:
Robert Arthur
3.85 avg rating — 2,777 ratings 9. 
The Secret of the Crooked Cat (Alfred Hitchcock and The Three Investigators, #13)
by:
William Arden
3.76 avg rating — 2,078 ratings 10. 
The Mystery of the Talking Skull (Alfred Hitchcock and The Three Investigators, #11)
by:
Robert Arthur
3.85 avg rating — 3,214 ratings 11. 
The Secret of Skeleton Island (Alfred Hitchcock and The Three Investigators, #6)
by:
Robert Arthur
3.88 avg rating — 3,334 ratings 12. 
The Mystery of Death Trap Mine (Alfred Hitchcock and The Three Investigators, #24)
by:
M.V. Carey
3.74 avg rating — 1,095 ratings 13. 
The Mystery of the Dead Man's Riddle (Alfred Hitchcock and The Three Investigators, #22)
by:
William Arden
3.94 avg rating — 1,780 ratings 14. 
The Mystery of the Moaning Cave (Alfred Hitchcock and The Three Investigators, #10)
by:
William Arden
3.85 avg rating — 2,875 ratings 15. 
The Mystery of the Singing Serpent (Alfred Hitchcock and The Three Investigators, #17)
by:
M.V. Carey
3.78 avg rating — 1,545 ratings 16. 
The Secret of the Haunted Mirror (Alfred Hitchcock and The Three Investigators, #21)
by:
M.V. Carey
3.84 avg rating — 1,981 ratings 17. 
The Secret of Shark Reef (Alfred Hitchcock and The Three Investigators, #30)
by:
William Arden
3.68 avg rating — 1,108 ratings 18. 
The Mystery of the Magic Circle (Alfred Hitchcock and The Three Investigators, #27)
by:
M.V. Carey
3.70 avg rating — 1,057 ratings 19. 
The Mystery of the Laughing Shadow (Alfred Hitchcock and the Three Investigators, #12)
by:
William Arden
3.77 avg rating — 2,138 ratings 20. 
The Mystery of Monster Mountain (Alfred Hitchcock and The Three Investigators, #20)
by:
M.V. Carey
3.73 avg rating — 1,290 ratings 20. 
The Mystery of the Shrinking House (Alfred Hitchcock and The Three Investigators, #18)
by:
William Arden
3.85 avg rating — 1,976 ratings 22. 
The Mystery of the Rogues' Reunion (The Three Investigators, #40)
by:
Marc Brandel
3.78 avg rating — 748 ratings 23. 
The Mystery of the Coughing Dragon (Alfred Hitchcock and The Three Investigators, #14)
by:
Nick West
3.73 avg rating — 2,030 ratings 24. 
The Mystery of the Headless Horse (Alfred Hitchcock and The Three Investigators, #26)
by:
William Arden
3.80 avg rating — 1,656 ratings 25. 
The Mystery of the Flaming Footprints (Alfred Hitchcock and The Three Investigators, #15)
by:
M.V. Carey
3.83 avg rating — 2,447 ratings 26. 
The Mystery of the Creep-Show Crooks (The Three Investigators, #41)
by:
M.V. Carey
3.66 avg rating — 534 ratings 27. 
The Mystery of the Nervous Lion (Alfred Hitchcock and The Three Investigators, #16)
by:
Nick West
3.63 avg rating — 1,429 ratings 28. 
The Mystery of the Missing Mermaid (The Three Investigators, #36)
by:
M.V. Carey
3.64 avg rating — 727 ratings 29. 
The Mystery of Wreckers' Rock (The Three Investigators, #42)
by:
William Arden
3.64 avg rating — 571 ratings 30. 
The Mystery of the Invisible Dog (Alfred Hitchcock and The Three Investigators, #23)
by:
M.V. Carey
3.88 avg rating — 2,057 ratings 31. 
The Mystery of the Sinister Scarecrow (Alfred Hitchcock and The Three Investigators, #29)
by:
M.V. Carey
3.78 avg rating — 1,193 ratings 32. 
The Mystery of the Dancing Devil (Alfred Hitchcock and The Three Investigators, #25)
by:
William Arden
3.72 avg rating — 1,313 ratings 33. 
The Secret of Phantom Lake (Alfred Hitchcock and The Three Investigators, #19)
by:
William Arden
3.76 avg rating — 1,705 ratings 34. 
The Mystery of the Scar-Faced Beggar (The Three Investigators, #31)
by:
M.V. Carey
3.66 avg rating — 773 ratings 35. 
The Mystery of the Blazing Cliffs (The Three Investigators, #32)
by:
M.V. Carey
3.69 avg rating — 829 ratings 36. 
The Mystery of the Cranky Collector (The Three Investigators, #43)
by:
M.V. Carey
3.58 avg rating — 537 ratings 37. 
The Mystery of the Trail of Terror (The Three Investigators, #39)
by:
M.V. Carey
3.58 avg rating — 654 ratings 38. 
The Mystery of the Smashing Glass (The Three Investigators, #38)
by:
William Arden
3.67 avg rating — 735 ratings 39. 
The Mystery of the Two-Toed Pigeon (The Three Investigators, #37)
by:
Marc Brandel
3.65 avg rating — 687 ratings 40. 
The Mystery of the Kidnapped Whale (The Three Investigators, #35)
by:
Marc Brandel
3.80 avg rating — 893 ratings 41. 
The Mystery of the Wandering Caveman (The Three Investigators, #34)
by:
M.V. Carey
3.56 avg rating — 663 ratings 42. 
The Mystery of the Purple Pirate (The Three Investigators, #33)
by:
William Arden
3.61 avg rating — 915 ratings 43. 
The Mystery of the Deadly Double (Alfred Hitchcock and The Three Investigators, #28)
by:
William Arden
3.81 avg rating — 1,140 ratings