Try free for 30 days

1 credit a month to use on any title, yours to keep (you’ll use your first credit on this title).
Stream or download thousands of included titles.
Access to exclusive deals and discounts.
$16.45 a month after 30 day trial. Cancel anytime.
The Rule of Four cover art

The Rule of Four

By: Ian Caldwell, Dustin Thomason
Narrated by: Josh Hamilton
Try for $0.00

$16.45 per month after 30 days. Cancel anytime.

Buy Now for $19.29

Buy Now for $19.29

Pay using voucher balance (if applicable) then card ending in
By confirming your purchase, you agree to Audible's Conditions Of Use and Privacy Notice and authorise Audible to charge your designated credit card or another available credit card on file.

Publisher's Summary

The Hypnerotomachia Poliphili is one of the most complex books ever written. Coded in seven languages, it is a passionate love story, an intricate mathematical labyrinth, and a tale of Renaissance tragedy that has baffled scholars since it was first published in 1499.

Five hundred years later, Princeton student Tom Sullivan is haunted by the violent death of his father, an academic who devoted his life to unlocking the book's secret. With his roommate Paul, Tom discovers a long-lost diary that holds the key to the puzzle.

But when a fellow researcher is murdered only hours later, the two friends find themselves in great danger, working desperately to break the book's code and uncover a Renaissance tale of passion and blood, a hidden crypt, and secret worth dying to protect.

©2004 Ian Caldwell and Dustin Thomaso

What listeners say about The Rule of Four

Average Customer Ratings

Reviews - Please select the tabs below to change the source of reviews.

In the spirit of reconciliation, Audible acknowledges the Traditional Custodians of country throughout Australia and their connections to land, sea and community. We pay our respect to their elders past and present and extend that respect to all Aboriginal and Torres Strait Islander peoples today.