The Heart Principle: Audiobook
Book 3 of the Kiss Quotient series
According to The Books Insider's catalog data, The Heart Principle runs 9.5 hours as an unabridged audiobook, narrated by Natalie Naudus and Brian Nishii (about 6.3 hours at 1.5× playback speed).
The instrument When will you finish it?
Based on 9.5 hours of listening.
| Your pace | You'll finish in |
|---|---|
| 30 min / day | 19 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 9.5 hours, it runs longer than 69% of the 16,241 Modern audiobooks in our catalog.
More narrated by Natalie Naudus
Natalie Naudus narrates 371 unabridged audiobooks in our catalog, 3,733 hours in all.
About as long, on the Modern shelf
3,461 Modern 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 Heart Principle is book 3 of Helen Hoang's Kiss Quotient series: a 9.5-hour unabridged recording, read by Natalie Naudus and Brian Nishii, released September 2, 2021, on the Rom-Com and Modern shelves.
The listen at a glance
- Length
- 9.5 hrs
- Narrated by
- Natalie Naudus, Brian Nishii
- Released
- September 2, 2021
- Format
- Unabridged audiobook
- Language
- English
- Store shelves
- Rom-Com, Modern
- Series
- The Kiss Quotient #3
- ISBN
- 9781666553239
How to listen to The Heart Principle 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 Heart Principle as an audiobook?
The Heart Principle runs 9.5 hours unabridged. At 1.5× speed that drops to roughly 6.3 hours.
Is The Heart Principle free as an audiobook?
Yes, for new listeners: the trial starts you with three free audiobooks.
Who narrates The Heart Principle?
The Heart Principle is narrated by Natalie Naudus and Brian Nishii.