What the Fireflies Knew: Audiobook
According to The Books Insider's catalog data, the What the Fireflies Knew audiobook runs 8.6 hours unabridged, narrated by Zenzi Williams (about 5.7 hours at 1.5× playback speed).
The instrument When will you finish it?
Based on 8.6 hours of listening.
| Your pace | You'll finish in |
|---|---|
| 30 min / day | 18 days |
| 1 hour / day | 9 days |
| 2 hours / day | 5 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 8.6 hours, it is shorter than 58% of the 5,930 Literary Fiction audiobooks in our catalog.
More narrated by Zenzi Williams
Zenzi Williams narrates 6 unabridged audiobooks in our catalog, 51 hours in all.
- Accidentally in Love
- Love and Other Flight Delays
- An Autobiography of Skin
- Piecing Me Together: From the winner of the Newbery Medal 2026
- Piecing Me Together: Newbery Honor and Coretta Scott King Author Award Winner
About as long, on the Literary Fiction shelf
1,128 Literary Fiction audiobooks in our catalog run within 10% of this length. The most popular on the store:
- An American Marriage
- Daisy Jones & The Six
- The Couple Next Door
- The Life We Bury
- Call Me by Your Name
Computed from 170,512 English-language unabridged audiobooks in The Books Insider catalog (store data read October 21, 2026). Lengths are the store's own running times. Methodology.
About this listen
What the Fireflies Knew is an audiobook by Kai Harris: a 8.6-hour unabridged recording, read by Zenzi Williams, released February 1, 2022, on the Coming of Age and Literary Fiction shelves.
The listen at a glance
- Length
- 8.6 hrs
- Narrated by
- Zenzi Williams
- Released
- February 1, 2022
- Format
- Unabridged audiobook
- Language
- English
- Store shelves
- Coming of Age, Literary Fiction
- ISBN
- 9780593510971
How to listen to What the Fireflies Knew 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 What the Fireflies Knew audiobook?
What the Fireflies Knew runs 8.6 hours unabridged. At 1.5× speed that drops to roughly 5.7 hours.
Is the What the Fireflies Knew audiobook free?
Yes, for new listeners: the trial starts you with three free audiobooks.
Who narrates What the Fireflies Knew?
What the Fireflies Knew is narrated by Zenzi Williams.