Secondary Protocol: An Adam Cain and Copernicus Smith Adventure: Audiobook
Book 3 of the Human Chronicles Legacy series
According to The Books Insider's catalog data, the Secondary Protocol: An Adam Cain and Copernicus Smith Adventure audiobook runs 5.8 hours unabridged, narrated by Keith Sellon-Wright (about 3.8 hours at 1.5× playback speed).
The instrument When will you finish it?
Based on 5.8 hours of listening.
| Your pace | You'll finish in |
|---|---|
| 30 min / day | 12 days |
| 1 hour / day | 6 days |
| 2 hours / day | 3 days |
| 1 hour / day at 1.5× | 4 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 5.8 hours, it is shorter than 72% of the 13,269 Science Fiction audiobooks in our catalog.
Catching up on Human Chronicles Legacy
This is book 3. Books 1 to 2 run 12.3 hours before it; books 1 to 6 run 33.9 hours in all.
More narrated by Keith Sellon-Wright
Keith Sellon-Wright narrates 143 unabridged audiobooks in our catalog, 1,397 hours in all.
- Bind, Torture, Kill: The Inside Story of BTK, the Serial Killer Next Door
- The Search for the Green River Killer: The True Story of America's Most Prolific Serial Killer
- Sex Money Murder: A Story of Crack, Blood, and Betrayal
- When a Killer Calls: A Haunting Story of Murder, Criminal Profiling, and Justice in a Small Town
- Ted Bundy: Conversations with a Killer
About as long, on the Science Fiction shelf
873 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
Secondary Protocol: An Adam Cain and Copernicus Smith Adventure is book 3 of T.R. Harris's Human Chronicles Legacy series: a 5.8-hour unabridged recording, read by Keith Sellon-Wright, released May 17, 2022, on the Science Fiction shelf.
The listen at a glance
- Length
- 5.8 hrs
- Narrated by
- Keith Sellon-Wright
- Released
- May 17, 2022
- Format
- Unabridged audiobook
- Language
- English
- Store shelves
- Science Fiction
- Series
- Human Chronicles Legacy #3
- ISBN
- 9798765020661
How to listen to Secondary Protocol: An Adam Cain and Copernicus Smith Adventure 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 Secondary Protocol: An Adam Cain and Copernicus Smith Adventure audiobook?
Secondary Protocol: An Adam Cain and Copernicus Smith Adventure runs 5.8 hours unabridged. At 1.5× speed that drops to roughly 3.8 hours.
Is the Secondary Protocol: An Adam Cain and Copernicus Smith Adventure audiobook free?
Yes, for new listeners: the trial starts you with three free audiobooks.
Who narrates Secondary Protocol: An Adam Cain and Copernicus Smith Adventure?
Secondary Protocol: An Adam Cain and Copernicus Smith Adventure is narrated by Keith Sellon-Wright.