The Know-It-All: One Man's Humble Quest to Become the Smartest Person in the World: Audiobook
According to The Books Insider's catalog data, The Know-It-All: One Man's Humble Quest to Become the Smartest Person in the World runs 15.5 hours as an unabridged audiobook, narrated by Geoffrey Cantor (about 10.3 hours at 1.5× playback speed).
The instrument When will you finish it?
Based on 15.5 hours of listening.
| Your pace | You'll finish in |
|---|---|
| 30 min / day | 31 days |
| 1 hour / day | 16 days |
| 2 hours / day | 8 days |
| 1 hour / day at 1.5× | 11 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 15.5 hours, it runs longer than 98% of the 2,498 Parenting audiobooks in our catalog.
More narrated by Geoffrey Cantor
Geoffrey Cantor narrates 11 unabridged audiobooks in our catalog, 111 hours in all.
About as long, on the Parenting shelf
28 Parenting audiobooks in our catalog run within 10% of this length. The most popular on the store:
- Solve Your Child's Sleep Problems
- The Sleep Lady's Good Night, Sleep Tight: Gentle Proven Solutions to Help Your Child Sleep Without Leaving Them to Cry it Out
- American Girls: Social Media and the Secret Lives of Teenagers
- The Informed Parent: A Science-Based Resource for Your Child’s First Four Years
- Successfully Navigating Your Parents' Senior Years: Critical Information to Maximize Their Independence and Make Sure They Get the Care They Need
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 Know-It-All: One Man's Humble Quest to Become the Smartest Person in the World is an audiobook by A.J. Jacobs: a 15.5-hour unabridged recording, read by Geoffrey Cantor, released September 27, 2004, on the Parenting and Biography & Memoir shelves.
The listen at a glance
- Length
- 15.5 hrs
- Narrated by
- Geoffrey Cantor
- Released
- September 27, 2004
- Format
- Unabridged audiobook
- Language
- English
- Store shelves
- Parenting, Biography & Memoir
- ISBN
- 9781598871715
How to listen to The Know-It-All: One Man's Humble Quest to Become the Smartest Person in the World 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 Know-It-All: One Man's Humble Quest to Become the Smartest Person in the World as an audiobook?
The Know-It-All: One Man's Humble Quest to Become the Smartest Person in the World runs 15.5 hours unabridged. At 1.5× speed that drops to roughly 10.3 hours.
Is The Know-It-All: One Man's Humble Quest to Become the Smartest Person in the World free as an audiobook?
Yes, for new listeners: the trial starts you with three free audiobooks.
Who narrates The Know-It-All: One Man's Humble Quest to Become the Smartest Person in the World?
The Know-It-All: One Man's Humble Quest to Become the Smartest Person in the World is narrated by Geoffrey Cantor.
Is The Know-It-All: One Man's Humble Quest to Become the Smartest Person in the World worth listening to at 1.5× speed?
At 1.5× you'd finish in about 10.3 hours, saving 5.2 hours.