The Great Airport Mystery
Lu par Anthony St. Pierre
The boys prepare to graduate from high school and are witnesses to a suspicious airplane emergency landing. Soon they become involved with their father, the famous detective Fenton Hardy, in investigating a theft ring only to be falsely accused and arrested. Bailed out by wealthy individuals that the boys had solved mysteries for in the past, the intrepid duo sets about to solve the thefts and clear their names. - Summary by James R Hedrick
Chapitres
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| Peril from the Sky | 7:36 | Lu par Anthony St. Pierre | |
| The Crash | 10:47 | Lu par Anthony St. Pierre | |
| A Promise of Trouble | 9:24 | Lu par Anthony St. Pierre | |
| An Attack | 10:27 | Lu par Anthony St. Pierre | |
| Anxious Days | 10:10 | Lu par Anthony St. Pierre | |
| The Mysterious Cabin | 11:15 | Lu par Anthony St. Pierre | |
| A Mysterious Conversation | 8:51 | Lu par Anthony St. Pierre | |
| Puzzled | 8:46 | Lu par Anthony St. Pierre | |
| Missing Mail | 11:28 | Lu par Anthony St. Pierre | |
| Looking for Clues | 11:13 | Lu par Anthony St. Pierre | |
| News From the City | 10:32 | Lu par Anthony St. Pierre | |
| Under Arrest | 11:11 | Lu par Anthony St. Pierre | |
| Circumstantial Evidence | 11:00 | Lu par Anthony St. Pierre | |
| Held for Trial | 12:03 | Lu par Anthony St. Pierre | |
| On the Trail of Ollie Jacobs | 12:50 | Lu par Anthony St. Pierre | |
| Mysterious Plans | 9:03 | Lu par Anthony St. Pierre | |
| Dangerous Business | 10:46 | Lu par Anthony St. Pierre | |
| The Warning Message | 10:40 | Lu par Anthony St. Pierre | |
| The Twenty-eighth | 11:09 | Lu par Anthony St. Pierre | |
| That Night | 10:16 | Lu par Anthony St. Pierre | |
| West of Bacon Hill | 8:46 | Lu par Anthony St. Pierre | |
| Captured | 8:47 | Lu par Anthony St. Pierre | |
| Back in Bayport | 11:31 | Lu par Anthony St. Pierre | |
| Vindicated | 4:21 | Lu par Anthony St. Pierre |