The Books Insiderindependent audiobook data
The Altreian Enigma by Richard Phillips

The Altreian Enigma: Audiobook

Book 2 of the Rho Agenda Assimilation series

According to The Books Insider's catalog data, The Altreian Enigma runs 10.4 hours as an unabridged audiobook, narrated by MacLeod Andrews (about 6.9 hours at 1.5× playback speed).

10.4listening hrs
Science Fictionstore shelf
2016released
Free for new listeners

The instrument When will you finish it?

Based on 10.4 hours of listening.

Days to finish The Altreian Enigma at common listening paces
Your paceYou'll finish in
30 min / day21 days
1 hour / day11 days
2 hours / day6 days
1 hour / day at 1.5×7 days

Part of The Audiobook Finish-Time Calculator: the same instrument for any audiobook we measure.

What our data says

  • At 10.4 hours, it runs longer than 64% of the 13,269 Science Fiction audiobooks in our catalog.

About as long, on the Science Fiction shelf

2,142 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 Altreian Enigma is book 2 of Richard Phillips's Rho Agenda Assimilation series: a 10.4-hour unabridged recording, read by MacLeod Andrews, released December 6, 2016, on the Science Fiction shelf.

The listen at a glance

Length
10.4 hrs
Narrated by
MacLeod Andrews
Released
December 6, 2016
Format
Unabridged audiobook
Language
English
Store shelves
Science Fiction
Series
Rho Agenda Assimilation #2
ISBN
9781511391382

How to listen to The Altreian Enigma 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.

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Questions listeners ask

How long is The Altreian Enigma as an audiobook?

The Altreian Enigma runs 10.4 hours unabridged. At 1.5× speed that drops to roughly 6.9 hours.

Is The Altreian Enigma free as an audiobook?

Yes, for new listeners: the trial starts you with three free audiobooks.

Who narrates The Altreian Enigma?

The Altreian Enigma is narrated by MacLeod Andrews.

Is The Altreian Enigma worth listening to at 1.5× speed?

At 1.5× you'd finish in about 6.9 hours, saving 3.5 hours.