Tunnel of Secrets: Audiobook
Book 10 of the Hardy Boys Adventures series
According to The Books Insider's catalog data, the Tunnel of Secrets audiobook runs 3.1 hours unabridged, narrated by Tim Gregory (about 2 hours at 1.5× playback speed).
The instrument When will you finish it?
Based on 3.1 hours of listening.
| Your pace | You'll finish in |
|---|---|
| 30 min / day | 7 days |
| 1 hour / day | 4 days |
| 2 hours / day | 2 days |
| 1 hour / day at 1.5× | 3 days |
You'll finish in – by –
Part of The Audiobook Finish-Time Calculator: the same instrument for any audiobook we measure.
What our data says
- At 3.1 hours, it runs longer than 58% of the 14,091 Non-fiction (Kids) audiobooks in our catalog.
Catching up on Hardy Boys Adventures
This is book 10. Books 1 to 9 run 27.9 hours before it; books 1 to 23 run 77.4 hours in all.
| Book | Title | Length |
|---|---|---|
| 1 | Secret of the Red Arrow | 3.6 hrs |
| 2 | Mystery of the Phantom Heist | 3 hrs |
| 3 | The Vanishing Game | 3.1 hrs |
| 4 | Into Thin Air | 2.7 hrs |
| 5 | Peril at Granite Peak | 3.5 hrs |
| 6 | The Battle of Bayport | 3.5 hrs |
| 7 | Shadows at Predator Reef | 2.9 hrs |
| 8 | Deception on the Set | 2.7 hrs |
| 9 | The Curse of the Ancient Emerald | 2.9 hrs |
| 10 | Tunnel of Secrets | 3.1 hrs |
| 11 | Showdown at Widow Creek | 2.8 hrs |
| 12 | The Madman of Black Bear Mountain | 2.9 hrs |
More narrated by Tim Gregory
Tim Gregory narrates 245 unabridged audiobooks in our catalog, 1,267 hours in all.
About as long, on the Non-fiction (Kids) shelf
758 Non-fiction (Kids) audiobooks in our catalog run within 10% of this length. The most popular on the store:
Computed from 409,794 English-language unabridged audiobooks in The Books Insider catalog (store data read November 3, 2026). Lengths are the store's own running times. Methodology.
About this listen
Tunnel of Secrets is book 10 of Franklin W. Dixon's Hardy Boys Adventures series: a 3.1-hour unabridged recording, read by Tim Gregory, released October 20, 2015, on the Non-fiction (Kids) and Mystery & Fantasy shelves.
The listen at a glance
- Length
- 3.1 hrs
- Narrated by
- Tim Gregory
- Released
- October 20, 2015
- Format
- Unabridged audiobook
- Language
- English
- Store shelves
- Non-fiction (Kids), Mystery & Fantasy
- Series
- Hardy Boys Adventures #10
- ISBN
- 9781621885535
How to listen to Tunnel of Secrets free
New members at audiobooks.com get three free audiobooks with the trial.
Separately, the store's catalog carries more than 10,000 audiobooks that are always free to stream.
Start listening freeQuestions listeners ask
How long is the Tunnel of Secrets audiobook?
Tunnel of Secrets runs 3.1 hours unabridged. At 1.5× speed that drops to roughly 2 hours.
Is the Tunnel of Secrets audiobook free?
Yes, for new listeners: the trial starts you with three free audiobooks.
Who narrates Tunnel of Secrets?
Tunnel of Secrets is narrated by Tim Gregory.