The Doomsday Key: A Sigma Force Novel: Audiobook
Book 6 of the Sigma Force series
According to The Books Insider's catalog data, The Doomsday Key: A Sigma Force Novel runs 14.5 hours as an unabridged audiobook, narrated by Peter J. Fernandez (about 9.7 hours at 1.5× playback speed).
The instrument When will you finish it?
Based on 14.5 hours of listening.
| Your pace | You'll finish in |
|---|---|
| 30 min / day | 29 days |
| 1 hour / day | 15 days |
| 2 hours / day | 8 days |
| 1 hour / day at 1.5× | 10 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 14.5 hours, it runs longer than 88% of the 6,730 Action & Adventure (Fiction) audiobooks in our catalog.
Catching up on Sigma Force
This is book 6. Books 1 to 5 run 78.4 hours before it; books 1 to 18 run 271.5 hours in all.
| Book | Title | Length |
|---|---|---|
| 1 | Sandstorm | 16.4 hrs |
| 2 | Map of Bones: A Sigma Force Novel | 14.1 hrs |
| 3 | The Black Order: A Sigma Force Novel | 14.8 hrs |
| 4 | The Judas Strain: A Sigma Force Novel | 18.7 hrs |
| 5 | The Last Oracle: A Sigma Force Novel | 14.5 hrs |
| 6 | The Doomsday Key: A Sigma Force Novel | 14.5 hrs |
| 7 | The Devil Colony: A Sigma Force Novel | 15.5 hrs |
| 8 | Bloodline: A Sigma Force Novel | 15.3 hrs |
| 9 | The Eye of God: A Sigma Force Novel | 14.7 hrs |
| 10 | The 6th Extinction: A Sigma Force Novel | 15 hrs |
| 11 | The Bone Labyrinth: A Sigma Force Novel | 15.2 hrs |
| 12 | The Seventh Plague: A Sigma Force Novel | 13.2 hrs |
More narrated by Peter J. Fernandez
Peter J. Fernandez narrates 88 unabridged audiobooks in our catalog, 1,014 hours in all.
- Mary, Mary
- The Big Bad Wolf
- London Bridges
- Four Blind Mice
- Cross
About as long, on the Action & Adventure (Fiction) shelf
577 Action & Adventure (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 Doomsday Key: A Sigma Force Novel is book 6 of James Rollins's Sigma Force series: a 14.5-hour unabridged recording, read by Peter J. Fernandez, released June 23, 2009, on the Action & Adventure (Fiction) shelf.
The listen at a glance
- Length
- 14.5 hrs
- Narrated by
- Peter J. Fernandez
- Released
- June 23, 2009
- Format
- Unabridged audiobook
- Language
- English
- Store shelves
- Action & Adventure (Fiction)
- Series
- Sigma Force #6
- ISBN
- 9780061902215
How to listen to The Doomsday Key: A Sigma Force Novel 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 Doomsday Key: A Sigma Force Novel as an audiobook?
The Doomsday Key: A Sigma Force Novel runs 14.5 hours unabridged. At 1.5× speed that drops to roughly 9.7 hours.
Is The Doomsday Key: A Sigma Force Novel free as an audiobook?
Yes, for new listeners: the trial starts you with three free audiobooks.
Who narrates The Doomsday Key: A Sigma Force Novel?
The Doomsday Key: A Sigma Force Novel is narrated by Peter J. Fernandez.
Is The Doomsday Key: A Sigma Force Novel worth listening to at 1.5× speed?
At 1.5× you'd finish in about 9.7 hours, saving 4.8 hours.