The Sum: Audiobook
Book 5 of the Trusted Thriller series
According to The Books Insider's catalog data, The Sum runs 17.4 hours as an unabridged audiobook, narrated by Bridget Thomas (about 11.6 hours at 1.5× playback speed).
The instrument When will you finish it?
Based on 17.4 hours of listening.
| Your pace | You'll finish in |
|---|---|
| 30 min / day | 35 days |
| 1 hour / day | 18 days |
| 2 hours / day | 9 days |
| 1 hour / day at 1.5× | 12 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 17.4 hours, it runs longer than 93% of the 13,269 Science Fiction audiobooks in our catalog.
Catching up on The Trusted Thriller Series
This is book 5. Books 1 to 4 run 49.9 hours before it; books 1 to 5 run 67.3 hours in all.
| Book | Title | Length |
|---|---|---|
| 1 | The Trusted | 9.8 hrs |
| 2 | The Dominant | 13.5 hrs |
| 3 | The Resonance | 12.2 hrs |
| 4 | The Refracted | 14.3 hrs |
| 5 | The Sum | 17.4 hrs |
More narrated by Bridget Thomas
Bridget Thomas narrates 50 unabridged audiobooks in our catalog, 502 hours in all.
About as long, on the Science Fiction shelf
691 Science Fiction 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 Sum is book 5 of Michelle Medhat's Trusted Thriller series: a 17.4-hour unabridged recording, read by Bridget Thomas, released May 11, 2022, on the Espionage and Legal & Political shelves.
The listen at a glance
- Length
- 17.4 hrs
- Narrated by
- Bridget Thomas
- Released
- May 11, 2022
- Format
- Unabridged audiobook
- Language
- English
- Store shelves
- Espionage, Legal & Political, Science Fiction
- Series
- The Trusted Thriller Series #5
- ISBN
- 9798200996230
How to listen to The Sum 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 Sum as an audiobook?
The Sum runs 17.4 hours unabridged. At 1.5× speed that drops to roughly 11.6 hours.
Is The Sum free as an audiobook?
Yes, for new listeners: the trial starts you with three free audiobooks.
Who narrates The Sum?
The Sum is narrated by Bridget Thomas.
Is The Sum worth listening to at 1.5× speed?
At 1.5× you'd finish in about 11.6 hours, saving 5.8 hours.