Defend the Realm: The Authorized History of MI5: Audiobook
According to The Books Insider's catalog data, the Defend the Realm: The Authorized History of MI5 audiobook runs 39.6 hours unabridged, narrated by Robin Sachs (about 26.4 hours at 1.5× playback speed).
The instrument When will you finish it?
Based on 39.6 hours of listening.
| Your pace | You'll finish in |
|---|---|
| 30 min / day | 80 days |
| 1 hour / day | 40 days |
| 2 hours / day | 20 days |
| 1 hour / day at 1.5× | 27 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 39.6 hours, it runs longer than 99% of the 7,179 World audiobooks in our catalog.
More narrated by Robin Sachs
Robin Sachs narrates 47 unabridged audiobooks in our catalog, 594 hours in all.
- The Tudors: The Complete Story of England's Most Notorious Dynasty
- The Tiger's Wife
- The Redbreast
- The Devil's Star
- Johannes Cabal the Detective
About as long, on the World shelf
36 World 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
Defend the Realm: The Authorized History of MI5 is an audiobook by Christopher Andrew: a 39.6-hour unabridged recording, read by Robin Sachs, released November 3, 2009, on the World shelf.
The listen at a glance
- Length
- 39.6 hrs
- Narrated by
- Robin Sachs
- Released
- November 3, 2009
- Format
- Unabridged audiobook
- Language
- English
- Store shelves
- World
- ISBN
- 9780307576606
How to listen to Defend the Realm: The Authorized History of MI5 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 Defend the Realm: The Authorized History of MI5 audiobook?
Defend the Realm: The Authorized History of MI5 runs 39.6 hours unabridged. At 1.5× speed that drops to roughly 26.4 hours.
Is the Defend the Realm: The Authorized History of MI5 audiobook free?
Yes, for new listeners: the trial starts you with three free audiobooks.
Who narrates Defend the Realm: The Authorized History of MI5?
Defend the Realm: The Authorized History of MI5 is narrated by Robin Sachs.
Is Defend the Realm: The Authorized History of MI5 worth listening to at 1.5× speed?
At 1.5× you'd finish in about 26.4 hours, saving 13.2 hours.