What do you know about fighting crime?                     Soda-Pop Mix-Up
The Case of the Dominant Dame                                  The Case of the Two Winners (short story)  
The Case of the Uncertain Seating                               Regan's Helper?
Musical Mystery                                                              Famous Places in the United States 
Redheaded Thief (minute mystery)                              The Suspect in the Restaurant (cartoon mystery)
The Kidnapped Camper (cartoon mystery)                  The Money Jar (minute mystery)
Pirates and Pirate Treasure                                           Doodlers' Noodlers
Rodeo Clown (minute mystery)                                     Crypto-Trixie
Lost Letters                                                                      The Case of the Semi-Circular Suspects
Hardheads and Suckers                                                  The Case of the Phantom Shoplifter
Inscrutable Bedtime Stories                                           The Holdup (minute mystery)
The Suspicious Professor (cartoon mystery)                The Exchange Student (cartoon mystery)
Long-lost Grandson (minute mystery)                          Legends and Folklore
Batter Up!                                                                        The Shopper (minute mystery) 
Quickie Quiz #1                                                               Word Ladders
Bafflers                                                                             The Mysterious Map
Counterfeit Art                                                                For Superstitious Folk Only
Little Boys Gone! (minute mystery)                              Quickie Quiz #2  
Losers--and Winners                                                       The Exterminators (minute mystery)
What a State!                                                                    Stop, Thief! (cartoon mystery)
Tongue Tanglers                                                              Exploring Caves
The Missing Footprints (cartoon mystery)                    The Nephew (minute mystery)
Dining Room Thief (minute mystery)                            Trixie and Honey's revenge
Missing Partners                                                              Embezzler!
Di's Memory Sharpener                                                  Town-Square Mystery (minute mystery)
Trixie's Hidden-Answer Quiz                                         Cryptic Lists
Quiz for Cogitators                                                          Quickie Quiz# 3
Poor Loser (minute mystery)                                         Masquerade Mystery(cartoon mystery
Help!                                                                                  Stable Trouble (minute mystery)
Animals-Storybook and Otherwise                               Mystery of Thirteen Spaces
The Stolen Horse (cartoon mystery)                             Answers
The Fire (minute mystery) 
About Horses