The Secret of the Ninth Planet: Audiobook
According to The Books Insider's catalog data, The Secret of the Ninth Planet runs 5.4 hours as an unabridged audiobook, narrated by Richard Kilmer (about 3.6 hours at 1.5× playback speed).
The instrument When will you finish it?
Based on 5.4 hours of listening.
| Your pace | You'll finish in |
|---|---|
| 30 min / day | 11 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 5.4 hours, it is shorter than 74% of the 13,269 Science Fiction audiobooks in our catalog.
More narrated by Richard Kilmer
Richard Kilmer narrates 44 unabridged audiobooks in our catalog, 378 hours in all.
About as long, on the Science Fiction shelf
761 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 Secret of the Ninth Planet is an audiobook by Donald A. Wollheim: a 5.4-hour unabridged recording, read by Richard Kilmer, released January 1, 2011, on the Science Fiction shelf.
The listen at a glance
- Length
- 5.4 hrs
- Narrated by
- Richard Kilmer
- Released
- January 1, 2011
- Format
- Unabridged audiobook
- Language
- English
- Store shelves
- Science Fiction
How to listen to The Secret of the Ninth Planet 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 Secret of the Ninth Planet as an audiobook?
The Secret of the Ninth Planet runs 5.4 hours unabridged. At 1.5× speed that drops to roughly 3.6 hours.
Is The Secret of the Ninth Planet free as an audiobook?
Yes, for new listeners: the trial starts you with three free audiobooks.
Who narrates The Secret of the Ninth Planet?
The Secret of the Ninth Planet is narrated by Richard Kilmer.