The Mystery of Tunnel 51: Book 1 in Wallace of the Secret Service Series: Audiobook
Book 1 of the Wallace of the Secret Service series
According to The Books Insider's catalog data, The Mystery of Tunnel 51: Book 1 in Wallace of the Secret Service Series runs 10.3 hours as an unabridged audiobook, narrated by David Timson (about 6.8 hours at 1.5× playback speed).
The instrument When will you finish it?
Based on 10.3 hours of listening.
| Your pace | You'll finish in |
|---|---|
| 30 min / day | 21 days |
| 1 hour / day | 11 days |
| 2 hours / day | 6 days |
| 1 hour / day at 1.5× | 7 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 10.3 hours, it runs longer than 75% of the 22,296 Police & Detective audiobooks in our catalog.
Catching up on Wallace of the Secret Service
This is book 1. Books 1 to 4 run 44 hours in all.
More narrated by David Timson
David Timson narrates 91 unabridged audiobooks in our catalog, 1,047 hours in all.
About as long, on the Police & Detective shelf
5,224 Police & Detective 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
The Mystery of Tunnel 51: Book 1 in Wallace of the Secret Service Series is book 1 of Alexander Wilson's Wallace of the Secret Service series: a 10.3-hour unabridged recording, read by David Timson, released February 4, 2016, on the Police & Detective shelf.
The listen at a glance
- Length
- 10.3 hrs
- Narrated by
- David Timson
- Released
- February 4, 2016
- Format
- Unabridged audiobook
- Language
- English
- Store shelves
- Police & Detective
- Series
- Wallace of the Secret Service #1
- ISBN
- 9781510015869
How to listen to The Mystery of Tunnel 51: Book 1 in Wallace of the Secret Service Series 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 Mystery of Tunnel 51: Book 1 in Wallace of the Secret Service Series as an audiobook?
The Mystery of Tunnel 51: Book 1 in Wallace of the Secret Service Series runs 10.3 hours unabridged. At 1.5× speed that drops to roughly 6.8 hours.
Is The Mystery of Tunnel 51: Book 1 in Wallace of the Secret Service Series free as an audiobook?
Yes, for new listeners: the trial starts you with three free audiobooks.
Who narrates The Mystery of Tunnel 51: Book 1 in Wallace of the Secret Service Series?
The Mystery of Tunnel 51: Book 1 in Wallace of the Secret Service Series is narrated by David Timson.
Is The Mystery of Tunnel 51: Book 1 in Wallace of the Secret Service Series worth listening to at 1.5× speed?
At 1.5× you'd finish in about 6.8 hours, saving 3.4 hours.