That Which The Deep Heart Knows: Audiobook
Book 1 of the Chronicles of Toxandria series
According to The Books Insider's catalog data, the That Which The Deep Heart Knows audiobook runs 13.4 hours unabridged, narrated by Martin Dukes (about 8.9 hours at 1.5× playback speed).
The instrument When will you finish it?
Based on 13.4 hours of listening.
| Your pace | You'll finish in |
|---|---|
| 30 min / day | 27 days |
| 1 hour / day | 14 days |
| 2 hours / day | 7 days |
| 1 hour / day at 1.5× | 9 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 13.4 hours, it runs longer than 81% of the 12,109 Fantasy audiobooks in our catalog.
Catching up on The Chronicles of Toxandria
This is book 1. Books 1 to 3 run 40.8 hours in all.
| Book | Title | Length |
|---|---|---|
| 1 | That Which The Deep Heart Knows | 13.4 hrs |
| 2 | A Trick of the Light | 12.8 hrs |
| 3 | Reign of Spears | 14.7 hrs |
About as long, on the Fantasy shelf
1,301 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
That Which The Deep Heart Knows is book 1 of Martin Dukes's Chronicles of Toxandria series: a 13.4-hour unabridged recording, read by Martin Dukes, released June 18, 2026, on the Fantasy shelf.
The listen at a glance
- Length
- 13.4 hrs
- Narrated by
- Martin Dukes
- Released
- June 18, 2026
- Format
- Unabridged audiobook
- Language
- English
- Store shelves
- Fantasy
- Series
- The Chronicles of Toxandria #1
- ISBN
- 9781066758401
How to listen to That Which The Deep Heart Knows 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 That Which The Deep Heart Knows audiobook?
That Which The Deep Heart Knows runs 13.4 hours unabridged. At 1.5× speed that drops to roughly 8.9 hours.
Is the That Which The Deep Heart Knows audiobook free?
Yes, for new listeners: the trial starts you with three free audiobooks.
Who narrates That Which The Deep Heart Knows?
That Which The Deep Heart Knows is narrated by Martin Dukes.
Is That Which The Deep Heart Knows worth listening to at 1.5× speed?
At 1.5× you'd finish in about 8.9 hours, saving 4.5 hours.