Undisclosed: Audiobook
According to The Books Insider's catalog data, the Undisclosed audiobook runs 11 hours unabridged, narrated by Jeffrey Kafer (about 7.3 hours at 1.5× playback speed).
The instrument When will you finish it?
Based on 11 hours of listening.
| Your pace | You'll finish in |
|---|---|
| 30 min / day | 22 days |
| 1 hour / day | 11 days |
| 2 hours / day | 6 days |
| 1 hour / day at 1.5× | 8 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 11 hours, it runs longer than 69% of the 13,269 Science Fiction audiobooks in our catalog.
More narrated by Jeffrey Kafer
Jeffrey Kafer narrates 348 unabridged audiobooks in our catalog, 2,896 hours in all.
About as long, on the Science Fiction shelf
2,156 Science Fiction audiobooks in our catalog run within 10% of this length. The most popular on the store:
- Dark Matter
- Star Wars: The Old Republic - Legends: Revan
- Armada
- Star Wars Legends: Darth Bane Trilogy: Rule of Two
- The Troop
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
Undisclosed is an audiobook by Steve Alten: a 11-hour unabridged recording, read by Jeffrey Kafer, released October 24, 2017, on the Science Fiction shelf.
The listen at a glance
- Length
- 11 hrs
- Narrated by
- Jeffrey Kafer
- Released
- October 24, 2017
- Format
- Unabridged audiobook
- Language
- English
- Store shelves
- Science Fiction
- ISBN
- 9781538480649
How to listen to Undisclosed 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 Undisclosed audiobook?
Undisclosed runs 11 hours unabridged. At 1.5× speed that drops to roughly 7.3 hours.
Is the Undisclosed audiobook free?
Yes, for new listeners: the trial starts you with three free audiobooks.
Who narrates Undisclosed?
Undisclosed is narrated by Jeffrey Kafer.
Is Undisclosed worth listening to at 1.5× speed?
At 1.5× you'd finish in about 7.3 hours, saving 3.7 hours.