The Rule of Four
Complex
Intelligent
Timeless

The Rule of Four

Tom Sullivan is about to graduate from Princeton. He's intelligent and popular, but haunted by the violent death several years earlier of his father, an academic who devoted his life to studying one of the rarest, most complex and most valuable books in the world. Since its publication in 1499, the Hypnerotomachia Poliphili has baffled scholars who have tried to understand its many mysteries. Coded in seven languages, the text is at once a passionate love story, an intricate mathematical labyrinth, and a tale of arcane brutality. Paul Harris, Tom's roommate, has deeply personal reasons of his own for wanting to unveil the secrets the book hides. When a long-lost diary surfaces, it seems the two friends have found the key to the labyrinth - but when a fellow researcher is murdered only hours later, they suddenly find themselves in great danger. And what they discover embedded in the text stuns them: a narrative detailing the passion of a Renaissance prince, a hidden crypt, and a secret worth dying to protect.
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Reviews

Photo of Sarah Sammis
Sarah Sammis@pussreboots
5 stars
Apr 4, 2024

I am a voracious reader but not one who will stay up past my bedtime to finish a book. It is a very rare book that will keep up to the wee hours. The Rule of Four by Ian Caldwell and Dustin Thomason is one of those rare books. The first half of this decade seems to have inspired a number of mystery books set around books and art. I don't think it's a Dan Brown phenomena even though his Angeles & Demons comes at the head of this trend in 2000. I think his novels are part of something bigger which includes The Rule of Four, and the mysteries by Matthew Pearl among others. The Rule of Four centers around a Princeton undergraduate's project to decode the Hypnerotomachia Poliphili (1499). The story could have just as easily been about a fictional tome. The four main characters: Thomas (the narrator), Paul (the protagonist), Charlie and Gil drive the story more than this enigmatic book does. Knowing that the book does exist and their discussions of its history is based on fact does add an extra layer of interest to this mystery but it's really just icing. The novel reminds me most of A Separate Peace by John Knowles (1959). Tom's friendship with Paul parallel's Gene's devotion to Finny. Where Tom has long since given up on the Hypnerotomachia Poliphili (his father having tried and failed to crack the book's secrets), Paul has that something extra that's needed to understand the hidden truth. It is Paul's connection to Finny that made me go from liking the book to loving it.

Photo of Jacque
Jacque@jacque_who
5 stars
Feb 23, 2023

I spent like three years trying to find this book and it was SO worth it. The simultaneously inspiring and tragic academia-focused book we all need.

+5
Photo of Chris Aldrich
Chris Aldrich@chrisaldrich
4 stars
Dec 26, 2021

** spoiler alert ** A nice little thriller about an obscure text from the Renaissance (quattrocento) set in modern times. This falls into the genre of historical fiction that's similar to Dan Brown's Robert Langdon series or films like the Nicolas Cage National Treasure series, though not quite as "rompish". I have to imagine that those who liked Mr. Penumbra's 24-Hour Bookstore, Gentlemen and Players, and The Thirteenth Tale will enjoy this quite a lot. Spoilers follow: The Vincent Taft character could have been a better "heavy" but was pretty functional in the story given his limited appearances in the actual plot. I saw the Savonarola portion of the plot a mile away, but to most this will be an interesting historical diversion/lesson. I thought the ending was a bit too literary given the more plot-motivated feel of the rest of the narrative, but in all, it was relatively satisfying given Tom's full back-story. I can see this being adapted into film, but it will take some creative ideas to better linearize the plot and to make the ending a bit bigger for the screen.

Photo of Saad
Saad@bulbasaur
5 stars
Jun 14, 2024
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Gigi V@barksandvino
4 stars
May 2, 2024
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Paula Alonso Ishihara@midorichan
3 stars
Feb 7, 2024
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Lindsy Rice@lindsyrice
3 stars
Jan 12, 2024
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Deyton Sehn@deyton
4 stars
Jul 9, 2023
Photo of Jessica Deaner
Jessica Deaner@jess1rph
2 stars
Nov 5, 2022
Photo of Marcus Richardson
Marcus Richardson@marcprich
4 stars
Sep 4, 2022
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Elisa Bieg@bookishexpat
3 stars
Aug 26, 2022
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Mary Rose Luksha@mayroundstone
3 stars
Jul 12, 2022
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Dani@mangoavenue
3 stars
Mar 23, 2022
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Susan Beddes@susanbeddes
4 stars
Mar 19, 2022
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Bee @izziewithay
3 stars
Mar 1, 2022
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Amanda Gilson@dinkycrow
3 stars
Feb 13, 2022
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Leon@lilybart
1 star
Jan 21, 2022
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Xavier Roy@xavierroy
4 stars
Jan 17, 2022
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akshaya@ashhio
3 stars
Nov 29, 2021
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Tanya Sutton@mrsreads
3 stars
Nov 16, 2021
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Nathan H@natehn
3 stars
Nov 10, 2021
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Amit Gawande@amit
3 stars
Sep 22, 2021
Photo of Heather Killeen
Heather Killeen@hturningpages
3 stars
Sep 5, 2021
Photo of Jeff Byrnes
Jeff Byrnes@jeffbyrnes
5 stars
Aug 30, 2021