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Hardy Boys APC Library Editions |
These library editions were bound from the late 1950s until the early 1970s by the American Publishers Corporation. Most of the books are blue while some scattered examples are red. | |||||
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![]() 1. The Tower Treasure |
![]() 3. The Secret of the Old Mill |
![]() 4. The Missing Chums |
![]() 6. The Shore Road Mystery |
![]() 7. The Secret of the Caves |
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![]() 9. The Great Airport Mystery |
![]() 10. What Happened at Midnight |
![]() 10. What Happened at Midnight |
![]() 11. While the Clock Ticked |
![]() 12. Footprints Under the Window |
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![]() 13. The Mark on the Door |
![]() 14. The Hidden Harbor Mystery |
![]() 15. The Sinister Signpost |
![]() 16. A Figure in Hiding |
![]() 17. The Secret Warning |
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![]() 18. The Twisted Claw |
![]() 19. The Disappearing Floor |
![]() 20. The Mystery of the Flying Express |
![]() 21. The Clue of the Broken Blade |
![]() 23. The Melted Coins |
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![]() 23. The Melted Coins |
![]() 24. The Short-Wave Mystery |
![]() 25. The Secret Panel |
![]() 26. The Phantom Freighter |
![]() 27. The Secret of Skull Mountain |
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![]() 27. The Secret of Skull Mountain |
![]() 28. The Sign of the Crooked Arrow |
![]() 28. The Sign of the Crooked Arrow |
![]() 28. The Sign of the Crooked Arrow |
![]() 29. The Secret of the Lost Tunnel |
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![]() 31. The Secret of Wildcat Swamp |
![]() 32. The Crisscross Shadow |
![]() 33. The Yellow Feather Mystery |
![]() 34. The Hooded Hawk Mystery |
![]() 34. The Hooded Hawk Mystery |
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![]() 36. The Secret of Pirates' Hill |
![]() 36. The Secret of Pirates' Hill |
![]() 37. The Ghost of Skeleton Rock |
![]() 38. The Mystery at Devil's Paw |
![]() 39. The Mystery of the Chinese Junk |
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![]() 40. The Mystery of the Desert Giant |
![]() 41. The Clue of the Screeching Owl |
![]() 43. The Mystery of the Aztec Warrior |
![]() 46. The Secret Agent on Flight 101 |
![]() 47. The Mystery of the Whale Tattoo |
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![]() 47. The Mystery of the Whale Tattoo |
![]() 49. The Bombay Boomerang |
![]() 51. The Masked Monkey |
52. The Shattered Helmet |
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