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Three Investigators series
1. Secret of Terror Castle - ARTHUR, ROBERT
2. Mystery of the stuttering parrot - ARTHUR, ROBERT
3. Mystery of the whispering mummy - ARTHUR, ROBERT
4. Mystery of the green ghost - ARTHUR, ROBERT
5. Mystery of the vanishing treasure - ARTHUR, ROBERT
6. Secret of Skeleton Island - ARTHUR, ROBERT
7. Mystery of the fiery eye - ARTHUR, ROBERT
8. Mystery of the silver spider - ARTHUR, ROBERT
9. Mystery of the screaming clock - ARTHUR, ROBERT
10. Mystery of the moaning cave - ARDEN, WILLIAM
11. Mystery of the talking skull - ARTHUR, ROBERT
12. Mystery of the laughing shadow - ARDEN, WILLIAM
13. Secret of the crooked cat - ARDEN, WILLIAM
14. Mystery of the coughing dragon - WEST, NICK
15. Mystery of the flaming footprints - CAREY, M. V.
16. Mystery of the nervous lion - WEST, NICK
17. Mystery of the singing serpent - CAREY, M. V.
18. Mystery of the shrinking house - ARDEN, WILLIAM
19. Secret of the phantom lake - ARDEN, WILLIAM
20. Mystery of Monster Mountain - CAREY, M. V.
21. Secret of the haunted mirror - CAREY, M. V.
22. Mystery of the dead man's riddle - ARDEN, WILLIAM
23. Mystery of the invisible dog - CAREY, M. V.
24. Mystery of Death Trap Mine - CAREY, M. V.
25. Mystery of the dancing devil - ARDEN, WILLIAM
26. Mystery of the headless horse - ARDEN, WILLIAM
27. Mystery of the magic circle - CAREY, M. V.
28. Mystery of the deadly double - ARDEN, WILLIAM
29. Mystery of the sinister scarecrow - CAREY, M. V.
30. Secret of Shark Reef - ARDEN, WILLIAM
31. Mystery of the scar-faced beggar - CAREY, M. V.
32. Mystery of the blazing cliffs - CAREY, M. V.
33. Mystery of the purple pirate - ARDEN, WILLIAM
34. Mystery of the wandering cave man - CAREY, M. V.
35. Mystery of the kidnapped whale - BRANDEL, MARC
36. Mystery of the missing mermaid - CAREY, M. V.
37. Mystery of the two-toed pigeon - BRANDEL, MARC
38. Mystery of the smashing glass - ARDEN, WILLIAM
39. Mystery of the trail of terror - CAREY, M. V.
40. Mystery of the rogues' reunion - BRANDEL, MARC
41. Mystery of the creep-show crooks - CAREY, M. V.
42. Mystery of the wreckers' rock - ARDEN, WILLIAM
43. Mystery of the cranky collector - CAREY, M. V.