A Question of Numbers: Audiobook
Book 5 of the A Lady Arianna Regency Mystery series
According to The Books Insider's catalog data, A Question of Numbers runs 10.3 hours as an unabridged audiobook, narrated by Mary Sarah (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 88% of the 5,716 Cozy Mystery audiobooks in our catalog.
Catching up on A Lady Arianna Regency Mystery
This is book 5. Books 1 to 4 run 36.9 hours before it; books 1 to 8 run 74.1 hours in all.
| Book | Title | Length |
|---|---|---|
| 1 | Sweet Revenge | 8.9 hrs |
| 2 | The Cocoa Conspiracy | 9.1 hrs |
| 3 | Recipe for Treason | 9.5 hrs |
| 4 | Smoke and Lies | 9.5 hrs |
| 5 | A Question of Numbers | 10.3 hrs |
| 6 | A Tangle of Serpents | 9.1 hrs |
| 7 | A Swirl of Shadows | 9.3 hrs |
| 8 | The Thunder of Stones | 8.6 hrs |
More narrated by Mary Sarah
Mary Sarah narrates 248 unabridged audiobooks in our catalog, 2,427 hours in all.
About as long, on the Cozy Mystery shelf
888 Cozy 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
A Question of Numbers is book 5 of Andrea Penrose's A Lady Arianna Regency Mystery series: a 10.3-hour unabridged recording, read by Mary Sarah, released January 26, 2021, on the Cozy Mystery shelf.
The listen at a glance
- Length
- 10.3 hrs
- Narrated by
- Mary Sarah
- Released
- January 26, 2021
- Format
- Unabridged audiobook
- Language
- English
- Store shelves
- Cozy Mystery
- Series
- A Lady Arianna Regency Mystery #5
- ISBN
- 9781705280607
How to listen to A Question of Numbers 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 A Question of Numbers as an audiobook?
A Question of Numbers runs 10.3 hours unabridged. At 1.5× speed that drops to roughly 6.8 hours.
Is A Question of Numbers free as an audiobook?
Yes, for new listeners: the trial starts you with three free audiobooks.
Who narrates A Question of Numbers?
A Question of Numbers is narrated by Mary Sarah.
Is A Question of Numbers worth listening to at 1.5× speed?
At 1.5× you'd finish in about 6.8 hours, saving 3.4 hours.