The Impossible Cube: Audiobook
Book 2 of the Clockwork Empire series
According to The Books Insider's catalog data, The Impossible Cube runs 10 hours as an unabridged audiobook, narrated by Kim Bretton and Curt Bonnem (about 6.7 hours at 1.5× playback speed).
The instrument When will you finish it?
Based on 10 hours of listening.
| Your pace | You'll finish in |
|---|---|
| 30 min / day | 20 days |
| 1 hour / day | 10 days |
| 2 hours / day | 5 days |
| 1 hour / day at 1.5× | 7 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 10 hours, it runs longer than 61% of the 13,269 Science Fiction audiobooks in our catalog.
Catching up on Clockwork Empire
This is book 2. Book 1 runs 12.5 hours before it; books 1 to 4 run 43 hours in all.
| Book | Title | Length |
|---|---|---|
| 1 | Doomsday Vault | 12.5 hrs |
| 2 | The Impossible Cube | 10 hrs |
| 3 | The Dragon Men | 9.7 hrs |
| 4 | The Havoc Machine | 10.7 hrs |
More narrated by Kim Bretton
Kim Bretton narrates 83 unabridged audiobooks in our catalog, 734 hours in all.
About as long, on the Science Fiction shelf
2,160 Science Fiction audiobooks in our catalog run within 10% of this length. The most popular on the store:
- And Then She Vanished
- Dark Matter
- Star Wars: The Old Republic - Legends: Revan
- Star Wars Legends: Darth Bane Trilogy: Rule of Two
- Star Wars Legends: Darth Bane Trilogy: Dynasty of Evil
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 Impossible Cube is book 2 of Steven Harper's Clockwork Empire series: a 10-hour unabridged recording, read by Kim Bretton and Curt Bonnem, released March 2, 2026, on the Science Fiction shelf.
The listen at a glance
- Length
- 10 hrs
- Narrated by
- Kim Bretton, Curt Bonnem
- Released
- March 2, 2026
- Format
- Unabridged audiobook
- Language
- English
- Store shelves
- Science Fiction
- Series
- Clockwork Empire #2
- ISBN
- 9798855554847
How to listen to The Impossible Cube 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 Impossible Cube as an audiobook?
The Impossible Cube runs 10 hours unabridged. At 1.5× speed that drops to roughly 6.7 hours.
Is The Impossible Cube free as an audiobook?
Yes, for new listeners: the trial starts you with three free audiobooks.
Who narrates The Impossible Cube?
The Impossible Cube is narrated by Kim Bretton and Curt Bonnem.
Is The Impossible Cube worth listening to at 1.5× speed?
At 1.5× you'd finish in about 6.7 hours, saving 3.3 hours.