Once Upon a Demon's Heart: Cruel Fates Duet, Book 1: Audiobook
Book 1 of the Once Upon a Demon's Heart series
According to The Books Insider's catalog data, the Once Upon a Demon's Heart: Cruel Fates Duet, Book 1 audiobook runs 7.9 hours unabridged, narrated by Madison Mitts and Theodore Zephyr (about 5.3 hours at 1.5× playback speed).
The instrument When will you finish it?
Based on 7.9 hours of listening.
| Your pace | You'll finish in |
|---|---|
| 30 min / day | 16 days |
| 1 hour / day | 8 days |
| 2 hours / day | 4 days |
| 1 hour / day at 1.5× | 6 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 7.9 hours, it is shorter than 58% of the 12,109 Fantasy audiobooks in our catalog.
More narrated by Madison Mitts
Madison Mitts narrates 34 unabridged audiobooks in our catalog, 294 hours in all.
About as long, on the Fantasy shelf
1,660 Fantasy 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
Once Upon a Demon's Heart: Cruel Fates Duet, Book 1 is book 1 of K. M. Moronova's Once Upon a Demon's Heart series: a 7.9-hour unabridged recording, read by Madison Mitts and Theodore Zephyr, released October 21, 2025, on the Fantasy and Romantasy (Romance) shelves.
The listen at a glance
- Length
- 7.9 hrs
- Narrated by
- Madison Mitts, Theodore Zephyr
- Released
- October 21, 2025
- Format
- Unabridged audiobook
- Language
- English
- Store shelves
- Fantasy, Romantasy (Romance), Romantasy (Science Fiction & Fantasy)
- Series
- Once Upon a Demon's Heart #1
- ISBN
- 9798347025084
How to listen to Once Upon a Demon's Heart: Cruel Fates Duet, Book 1 free
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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 Once Upon a Demon's Heart: Cruel Fates Duet, Book 1 audiobook?
Once Upon a Demon's Heart: Cruel Fates Duet, Book 1 runs 7.9 hours unabridged. At 1.5× speed that drops to roughly 5.3 hours.
Is the Once Upon a Demon's Heart: Cruel Fates Duet, Book 1 audiobook free?
Yes, for new listeners: the trial starts you with three free audiobooks.
Who narrates Once Upon a Demon's Heart: Cruel Fates Duet, Book 1?
Once Upon a Demon's Heart: Cruel Fates Duet, Book 1 is narrated by Madison Mitts and Theodore Zephyr.