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#1 The Secret of the Old Clock -
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#2 The Hidden Staircase -
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#3 The Bungalow Mystery -
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#4 The Mystery at Lilac Inn -
#5 The Secret of 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 -
#12 The Message in the Hollow Oak -
#13 Mystery of the Ivory Charm -
#14 The Whispering Statue -
#15 The Haunted Bridge -
#16 The Clue of the Tapping Heels -
#17 The Mystery of the Brass-Bound Trunk -
#18 The Mystery at the Moss-covered Mansion -
#19 The Quest of the Missing Map -
#20 The Clue in the Jewel Box -
#21 The Secret in the Old Attic -
#22 The Clue in the Crumbling Wall -
#23 The Mystery of the Tolling Bell -
#24 The Clue in the Old Album -
#25 The Ghost of Blackwood Hall -
#26 The Clue of the Leaning Chimney -
#27 The Secret of the Wooden Lady -
#28 The Clue of the Black Keys -
#29 Mystery at the Ski Jump -
#30 The Clue of the Velvet Mask -
#31 The Ringmaster's Secret -
#32 The Scarlet Slipper Mystery -
#33 The Witch Tree Symbol -
#34 The Hidden Window Mystery -
#35 The Haunted Showboat -
#36 The Secret of the Golden Pavilion -
#38 The Mystery of the Fire Dragon -
#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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#44 The Clue in the Crossword Cipher -
#45 The Spider Sapphire Mystery -
#46 The Invisible Intruder -
#47 The Mysterious Mannequin -
#48 The Crooked Banister -
#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 -
#55 Mystery of Crocodile Island -
#56 The Thirteenth Pearl -
#57 The Triple Hoax -
#58 The Flying Saucer Mystery -
#59 The Secret in the Old Lace -
#60 The Greek Symbol Mystery -
#61 The Swami's Ring -
#62 The Kachina Doll Mystery -
#63 The Twin Dilemma -
#64 Captive Witness -
#65 Mystery of the Winged Lion -
#66 Race Against Time -
#67 The Sinister Omen -
#68 The Elusive Heiress -
#70 The Broken Anchor -
#71 The Silver Cobweb -
#72 The Haunted Carousel -
#77 The Bluebeard Room -
#78 The Phantom of Venice -
#79 The Double Horror of Fenley Place -
#83 The Case of the Vanishing Veil -
#85 The Secret of Shady Glen -
#86 The Mystery of Misty Canyon -
#87 The Case of the Rising Star -
#88 The Search for Cindy Austin -
#90 The Puzzle at Pineview School -
#91 The Girl Who Couldn't Remember -
#92 The Ghost of Craven Cove -
#97 The Mystery at Magnolia Mansion
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#98 The Haunting of Horse Island -
#100 A Secret in Time -
#101 The Mystery of the Missing Millionairess -
#105 The Clue in the Antique Trunk -
#106 The Case of the Artful Crime -
#109 The Mystery of the Masked Rider
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#110 The Nutcracker Ballet Mystery -
#111 The Secret at Solaire -
#112 Crime in the Queen's Court -
#114 The Search for the Silver Persian -
#116 The Case of the Twin Teddy Bears -
#117 Mystery on the Menu -
#118 Trouble at Lake Tahoe -
#120 The Case of the Floating Crime -
#121 The Fortune Teller's Secret -
#122 The Message in the Haunted Mansion -
#124 The Secret of the Scarlet Hand -
#125 The Teen Model Mystery -
#126 The Riddle in the Rare Book -
#127 The Case of the Dangerous Solution -
#128 The Treasure in the Royal Tower -
#129 The Baby-Sitter Burglaries -
#132 The Fox Hunt Mystery -
#135 The Riddle of the Ruby Gazelle -
#136 The Wedding Day Mystery -
#137 In Search of the Black Rose -
#138 The Legend of the Lost Gold -
#139 The Secret of Candlelight Inn -
#141 The Wild Cat Crime -
#142 The Case of Capital Intrigue -
#144 The E-Mail Mystery -
#145 The Missing Horse Mystery -
#146 The Ghost of the Lantern Lady -
#150 Mystery at Moorsea Manor -
#151 The Chocolate-Covered Contest -
#153 Whispers in the Fog -
#156 The Secret in the Stars -
#158 The Curse of the Black Cat -
#161 Lost in the Everglades -
#162 The Case of the Lost Song -
#163 The Clues Challenge -
#164 The Mystery of the Mother Wolf -
#165 The Crime Lab Case -
#167 Mystery by Moonlight -
#168 The Bike Tour Mystery -
#169 The Mistletoe Mystery -
#171 Intrigue at the Grand Opera -
#173 Danger on the Great Lakes -
#174 A Taste of Danger -
#175 Werewolf in a Winter Wonderland