The Sigma Imperative: Audiobook
Book 3 of the Synth Crisis series
According to The Books Insider's catalog data, The Sigma Imperative runs 6.8 hours as an unabridged audiobook, narrated by Tucker McDougall (about 4.6 hours at 1.5× playback speed).
The instrument When will you finish it?
Based on 6.8 hours of listening.
| Your pace | You'll finish in |
|---|---|
| 30 min / day | 14 days |
| 1 hour / day | 7 days |
| 2 hours / day | 4 days |
| 1 hour / day at 1.5× | 5 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 6.8 hours, it is shorter than 65% of the 13,269 Science Fiction audiobooks in our catalog.
Catching up on The Synth Crisis
This is book 3. Books 1 to 2 run 14.7 hours before it; books 1 to 3 run 21.5 hours in all.
| Book | Title | Length |
|---|---|---|
| 1 | The Judas Cypher | 7.2 hrs |
| 2 | The Unsung Frame | 7.5 hrs |
| 3 | The Sigma Imperative | 6.8 hrs |
More narrated by Tucker McDougall
Tucker McDougall narrates 6 unabridged audiobooks in our catalog, 55 hours in all.
About as long, on the Science Fiction shelf
1,266 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 Sigma Imperative is book 3 of Greg Dragon's Synth Crisis series: a 6.8-hour unabridged recording, read by Tucker McDougall, released July 29, 2025, on the Science Fiction shelf.
The listen at a glance
- Length
- 6.8 hrs
- Narrated by
- Tucker McDougall
- Released
- July 29, 2025
- Format
- Unabridged audiobook
- Language
- English
- Store shelves
- Science Fiction
- Series
- The Synth Crisis #3
- ISBN
- 9798295354243
How to listen to The Sigma Imperative 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 Sigma Imperative as an audiobook?
The Sigma Imperative runs 6.8 hours unabridged. At 1.5× speed that drops to roughly 4.6 hours.
Is The Sigma Imperative free as an audiobook?
Yes, for new listeners: the trial starts you with three free audiobooks.
Who narrates The Sigma Imperative?
The Sigma Imperative is narrated by Tucker McDougall.