The Iron Heart of Mars: Audiobook
Book 1 of the Space Bound series
According to The Books Insider's catalog data, The Iron Heart of Mars runs 1.6 hours as an unabridged audiobook, narrated by Ramon De Ocampo (about 1.1 hours at 1.5× playback speed).
The instrument When will you finish it?
Based on 1.6 hours of listening.
| Your pace | You'll finish in |
|---|---|
| 30 min / day | 4 days |
| 1 hour / day | 2 days |
| 2 hours / day | 1 day |
| 1 hour / day at 1.5× | 2 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 1.6 hours, it is shorter than 66% of the 2,649 Action & Adventure (Kids) audiobooks in our catalog.
Catching up on Space Bound
This is book 1. Books 1 to 5 run 7.7 hours in all.
| Book | Title | Length |
|---|---|---|
| 1 | The Iron Heart of Mars | 1.6 hrs |
| 2 | The Dark Side of Mercury: Book 2 | 1.5 hrs |
| 3 | The Haze of Venus | 1.5 hrs |
| 4 | The Rift of the Moon | 1.5 hrs |
| 5 | The Red Storm of Jupiter | 1.5 hrs |
More narrated by Ramon De Ocampo
Ramon De Ocampo narrates 143 unabridged audiobooks in our catalog, 1,016 hours in all.
About as long, on the Action & Adventure (Kids) shelf
104 Action & Adventure (Kids) 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 Iron Heart of Mars is book 1 of R.J. Harbor's Space Bound series: a 1.6-hour unabridged recording, read by Ramon De Ocampo, released May 13, 2024, on the Action & Adventure (Kids) shelf.
The listen at a glance
- Length
- 1.6 hrs
- Narrated by
- Ramon De Ocampo
- Released
- May 13, 2024
- Format
- Unabridged audiobook
- Language
- English
- Store shelves
- Action & Adventure (Kids)
- Series
- Space Bound #1
- ISBN
- 9781646899067
How to listen to The Iron Heart of Mars 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 Iron Heart of Mars as an audiobook?
The Iron Heart of Mars runs 1.6 hours unabridged. At 1.5× speed that drops to roughly 1.1 hours.
Is The Iron Heart of Mars free as an audiobook?
Yes, for new listeners: the trial starts you with three free audiobooks.
Who narrates The Iron Heart of Mars?
The Iron Heart of Mars is narrated by Ramon De Ocampo.