The Cardinal Rule: Audiobook
Book 1 of the Strongbox Chronicles series
According to The Books Insider's catalog data, The Cardinal Rule runs 8.9 hours as an unabridged audiobook, narrated by Emma Love (about 5.9 hours at 1.5× playback speed).
The instrument When will you finish it?
Based on 8.9 hours of listening.
| Your pace | You'll finish in |
|---|---|
| 30 min / day | 18 days |
| 1 hour / day | 9 days |
| 2 hours / day | 5 days |
| 1 hour / day at 1.5× | 6 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 8.9 hours, it runs longer than 54% of the 7,690 Mystery audiobooks in our catalog.
Catching up on The Strongbox Chronicles
This is book 1. Books 1 to 2 run 17.4 hours in all.
| Book | Title | Length |
|---|---|---|
| 1 | The Cardinal Rule | 8.9 hrs |
| 2 | The Firebird Deception | 8.5 hrs |
More narrated by Emma Love
Emma Love narrates 55 unabridged audiobooks in our catalog, 457 hours in all.
About as long, on the Mystery shelf
1,666 Mystery 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 Cardinal Rule is book 1 of C. E. Murphy's Strongbox Chronicles series: a 8.9-hour unabridged recording, read by Emma Love, released December 21, 2021, on the Espionage and Mystery shelves.
The listen at a glance
- Length
- 8.9 hrs
- Narrated by
- Emma Love
- Released
- December 21, 2021
- Format
- Unabridged audiobook
- Language
- English
- Store shelves
- Espionage, Mystery
- Series
- The Strongbox Chronicles #1
- ISBN
- 9781094437507
How to listen to The Cardinal Rule 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 Cardinal Rule as an audiobook?
The Cardinal Rule runs 8.9 hours unabridged. At 1.5× speed that drops to roughly 5.9 hours.
Is The Cardinal Rule free as an audiobook?
Yes, for new listeners: the trial starts you with three free audiobooks.
Who narrates The Cardinal Rule?
The Cardinal Rule is narrated by Emma Love.