The Hardy Boys

1. 

   Book 1

   The tower treasure

   Leslie McFarlane

2. 

   Book 2

   The House on the Cliff

   Leslie McFarlane

3. 

   Book 5

   The Missing Chums

   Leslie McFarlane

4. 

   The secret of the old mill

   Leslie McFarlane, Tony Carpentieri

5. 

   The Crisscross Shadow

   Leslie McFarlane

6. 

   Hunting for Hidden Gold

   Leslie McFarlane

7. 

   The Shore Road Mystery

   Leslie McFarlane

8. 

   While the Clock Ticked

   Leslie McFarlane

9. 

   The Great Airport Mystery

   Leslie McFarlane

10. 

    The Mystery of Cabin Island

    Leslie McFarlane

11. 

    Dead on target

    Leslie McFarlane

12. 

    The Disappearing Floor

    Leslie McFarlane

13. 

    Footprints Under the Window

    Leslie McFarlane

14. 

    The Short-Wave Mystery

    Leslie McFarlane

15. 

    The secret of the caves

    Leslie McFarlane

16. 

    The Flickering Torch Mystery

    Leslie McFarlane

17. 

    What Happened at Midnight

    Leslie McFarlane

18. 

    Evil, Inc.

    Leslie McFarlane

19. 

    The Sinister Signpost

    Leslie McFarlane

20. 

    A Figure in Hiding

    Leslie McFarlane

21. 

    The Mystery of the Aztec Warrior

    Leslie McFarlane

22. 

    Night of the Werewolf

    Leslie McFarlane

23. 

    The Mark on the Door

    Leslie McFarlane

24. 

    Cult of Crime

    Leslie McFarlane

25. 

    The infinity clue

    Leslie McFarlane

26. 

    The Secret of Wildcat Swamp

    Leslie McFarlane

27. 

    The Secret Agent on Flight 101

    Leslie McFarlane

28. 

    The Viking Symbol Mystery

    Leslie McFarlane

29. 

    The Sign of the Crooked Arrow

    Leslie McFarlane

30. 

    The Clue of the Broken Blade

    Leslie McFarlane

31. 

    The Hooded Hawk Mystery

    Leslie McFarlane

32. 

    The Mystery of the Chinese Junk

    Leslie McFarlane

33. 

    Murder House

    Leslie McFarlane

34. 

    The Secret of the Lost Tunnel

    Leslie McFarlane

35. 

    The Sting of the Scorpion

    Leslie McFarlane

36. 

    Secret of Pirates' Hill

    Leslie McFarlane

37. 

    The Witchmaster's Key

    Leslie McFarlane

38. 

    Game Plan for Disaster

    Leslie McFarlane

39. 

    The Clue of the Screeching Owl

    Leslie McFarlane

40. 

    The Melted Coins

    Leslie McFarlane

41. 

    The Ghost at Skeleton Rock

    Leslie McFarlane

42. 

    The Yellow Feather Mystery

    Leslie McFarlane

43. 

    The Twisted Claw

    Leslie McFarlane

44. 

    The Secret of Skull Mountain

    Leslie McFarlane

45. 

    The Mystery of the Spiral Bridge

    Leslie McFarlane

46. 

    The Mystery of the Flying Express

    Leslie McFarlane

47. 

    The Jungle Pyramid

    Leslie McFarlane

48. 

    The Wailing Siren Mystery

    Leslie McFarlane

49. 

    The Four-Headed Dragon

    Leslie McFarlane

50. 

    The Last Laugh

    Leslie McFarlane

51. 

    The Submarine Caper

    Leslie McFarlane, Leslie Morrrill

52. 

    The Secret Panel

    Leslie McFarlane

53. 

    Tic-Tac-Terror

    Leslie McFarlane

54. 

    The Mysterious Caravan

    Leslie McFarlane

55. 

    The Shattered Helmet

    Leslie McFarlane

56. 

    The Clue of the Hissing Serpent

    Leslie McFarlane

57. 

    The Stone Idol

    Leslie McFarlane

58. The Voodoo PlotLeslie McFarlaneMcFarlane

    V

    The Voodoo Plot

    Leslie McFarlane

59. 

    Crime in the Kennel

    Leslie McFarlane

60. 

    The Billion Dollar Ransom

    Leslie McFarlane

61. 

    Danger on Vampire Trail

    Leslie McFarlane

Book data and covers from Open Library (openlibrary.org).