Voice From the Cave
Mildred A. Wirt Benson
Penny Parker and her father go on vacation accompanied by a mysterious woman and end up engrossed in a hunt for foreign spies! (Summary by Amanda Leung ) (3 hr 59 min)
Chapters
| An Uninvited Guest | 11:09 |
| Stormy Weather | 10:56 |
| A Jade Green Charm | 9:47 |
| No Camping Allowed | 11:44 |
| Over the Air | 6:00 |
| Breakfast Blues | 8:24 |
| The Bearded Stranger | 9:03 |
| Keeper of the Light | 10:22 |
| A Surprise from the Sky | 8:54 |
| Help from Mr. Emory | 10:18 |
| A Man of Mystery | 9:21 |
| Caught by the Tide | 8:22 |
| A Hidden Package | 9:54 |
| Voice From the Cave | 9:04 |
| Afterglow | 9:27 |
| Suspicion | 9:33 |
| Visitors Not Permitted | 9:58 |
| Inside the Lighthouse | 7:59 |
| A Locked Door | 8:36 |
| Nymphs of the Sea | 8:37 |
| The Cardboard Box | 11:16 |
| Unfinished Business | 8:54 |
| Night Adventure | 10:22 |
| Out of the Sea | 12:53 |
| A Scoop for Uncle Sam | 8:15 |