Caller Unknown: Audiobook
According to The Books Insider's catalog data, the Caller Unknown audiobook runs 15.4 hours unabridged, narrated by Jeff Harding (about 10.3 hours at 1.5× playback speed).
The instrument When will you finish it?
Based on 15.4 hours of listening.
| Your pace | You'll finish in |
|---|---|
| 30 min / day | 31 days |
| 1 hour / day | 16 days |
| 2 hours / day | 8 days |
| 1 hour / day at 1.5× | 11 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 15.4 hours, it runs longer than 97% of the 6,732 Psychological audiobooks in our catalog.
More narrated by Jeff Harding
Jeff Harding narrates 206 unabridged audiobooks in our catalog, 2,244 hours in all.
- The Midnight Line: (Jack Reacher 22)
- Blue Moon: (Jack Reacher 24)
- Cat & Mouse
- Past Tense: (Jack Reacher 23)
- Tripwire: (Jack Reacher 3)
About as long, on the Psychological shelf
247 Psychological 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
Caller Unknown is an audiobook by Oliver Johnson: a 15.4-hour unabridged recording, read by Jeff Harding, released May 6, 2026, on the Psychological shelf.
The listen at a glance
- Length
- 15.4 hrs
- Narrated by
- Jeff Harding
- Released
- May 6, 2026
- Format
- Unabridged audiobook
- Language
- English
- Store shelves
- Psychological
- ISBN
- 9781004203307
How to listen to Caller Unknown 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 Caller Unknown audiobook?
Caller Unknown runs 15.4 hours unabridged. At 1.5× speed that drops to roughly 10.3 hours.
Is the Caller Unknown audiobook free?
Yes, for new listeners: the trial starts you with three free audiobooks.
Who narrates Caller Unknown?
Caller Unknown is narrated by Jeff Harding.
Is Caller Unknown worth listening to at 1.5× speed?
At 1.5× you'd finish in about 10.3 hours, saving 5.1 hours.