• 1: The Secret of the Old Clock
• 2: The Hidden Staircase
• 3: The Bungalow Mystery
• 4: The Mystery at Lilac Inn
• 5: The Secret at Shadow Ranch
• 6: The Secret of Red Gate Farm
• 7: The Clue in the Diary
• 8: Nancy's Mysterious Letter
• 9: The Sign of the Twisted Candles
• 10: Password to Larkspur Lane
• 11: The Clue of the Broke Locket
• 12: The Message in the Hollow Oak
• 13: The Mystery of the Ivory Charm
• 14: The Whispering Statue

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• 17: The Mystery of the Brass Bound Trunk
• 18: Mystery of the Moss-Covered Mansion
• 19: The Quest of the Missing Map

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• 22: The Clue in the Crumbling Wall

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• 24: The Clue in the Old Album
• 25: The Ghost of Blackwood Hall
• 26: The Clue of the Leaning Chimney

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• 28: The Clue of the Black Keys
• 29: Mystery at the Ski Jump

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• 31: The Ringmaster's Secret
• 32: The Scarlet Slipper Mystery

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• 34: The Hidden Window Mystery
• 35: The Haunted Showboat
• 36: The Secret of the Golden Pavilion
• 37: The Clue in the Old Stagecoach
• 38: The Mystery of the Fire Dragon
• 39: The Clue of the Dancing Puppet
• 40: The Moonstone Castle Mystery
• 41: The Clue of the Whistling Bagpipes
• 42: The Phantom of Pine Hill
• 43: The Mystery of the 99 Steps

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• 45: The Spider Sapphire Mystery
• 46: The Invisible Intruder
• 47: The Mysterious Mannequin
• 49: The Secret of Mirror Bay
• 50: The Double Jinx Mystery
• 51: Mystery of the Glowing Eye
• 52: The Secret of the Forgotten City
• 53: The Sky Phantom
• 54: The Strange Message in the Parchment