Amazon.com Product Description (ISBN 0440241359, Mass Market Paperback)

An ivy league murder, a mysterious coded manuscript, and the secrets of a Renaissance prince collide memorably in The Rule of Four—a brilliant work of fiction that weaves together suspense and scholarship, high art and unimaginable treachery.

It's Easter at Princeton. Seniors are scrambling to finish their theses. And two students, Tom Sullivan and Paul Harris, are a hair's breadth from solving the mysteries of the Hypnerotomachia Poliphili—a renowned text attributed to an Italian nobleman, a work that has baffled scholars since its publication in 1499. For Tom, their research has been a link to his family's past—and an obstacle to the woman he loves. For Paul, it has become an obsession, the very reason for living. But as their deadline looms, research has stalled—until a long-lost diary surfaces with a vital clue. And when a fellow researcher is murdered just hours later, Tom and Paul realize that they are not the first to glimpse the Hypnerotomachia 's secrets.

Suddenly the stakes are raised, and as the two friends sift through the codes and riddles at the heart of the text, they are beginnning to see the manuscript in a new light—not simply as a story of faith, eroticism and pedantry, but as a bizarre, coded mathematical maze. And as they come closer and closer to deciphering the final puzzle of a book that has shattered careers, friendships and families, they know that their own lives are in mortal danger. Because at least one person has been killed for knowing too much. And they know even more.

From the streets of fifteenth-century Rome to the rarified realm of the Ivy League, from a shocking 500 year-old murder scene to the drama of a young man's coming of age, The Rule of Four takes us on an entertaining, illuminating tour of history—as it builds to a pinnacle of nearly unbearable suspense.


From the Hardcover edition.

Amazon.com Product Description (ISBN 0385337116, Hardcover)

An ivy league murder, a mysterious coded manuscript, and the secrets of a Renaissance prince collide memorably in The Rule of Four—a brilliant work of fiction that weaves together suspense and scholarship, high art and unimaginable treachery.

It's Easter at Princeton. Seniors are scrambling to finish their theses. And two students, Tom Sullivan and Paul Harris, are a hair's breadth from solving the mysteries of the Hypnerotomachia Poliphili—a renowned text attributed to an Italian nobleman, a work that has baffled scholars since its publication in 1499. For Tom, their research has been a link to his family's past—and an obstacle to the woman he loves. For Paul, it has become an obsession, the very reason for living. But as their deadline looms, research has stalled—until a long-lost diary surfaces with a vital clue. And when a fellow researcher is murdered just hours later, Tom and Paul realize that they are not the first to glimpse the Hypnerotomachia 's secrets.

Suddenly the stakes are raised, and as the two friends sift through the codes and riddles at the heart of the text, they are beginnning to see the manuscript in a new light—not simply as a story of faith, eroticism and pedantry, but as a bizarre, coded mathematical maze. And as they come closer and closer to deciphering the final puzzle of a book that has shattered careers, friendships and families, they know that their own lives are in mortal danger. Because at least one person has been killed for knowing too much. And they know even more.

From the streets of fifteenth-century Rome to the rarified realm of the Ivy League, from a shocking 500 year-old murder scene to the drama of a young man's coming of age, The Rule of Four takes us on an entertaining, illuminating tour of history—as it builds to a pinnacle of nearly unbearable suspense.

Amazon.com Book Description (ISBN 0099451956, Paperback)

A mysterious coded manuscript, a violent Ivy League murder, and the secrets of a Renaissance prince collide in a labyrinth of betrayal, madness, and genius.

THE RULE OF FOUR

Princeton. Good Friday, 1999. On the eve of graduation, two students are a hairsbreadth from solving the mysteries of the Hypnerotomachia Poliphili. Famous for its hypnotic power over those who study it, the five-hundred-year-old Hypnerotomachia may finally reveal its secrets -- to Tom Sullivan, whose father was obsessed with the book, and Paul Harris, whose future depends on it. As the deadline looms, research has stalled -- until an ancient diary surfaces. What Tom and Paul discover inside shocks even them: proof that the location of a hidden crypt has been ciphered within the pages of the obscure Renaissance text.

Armed with this final clue, the two friends delve into the bizarre world of the Hypnerotomachia -- a world of forgotten erudition, strange sexual appetites, and terrible violence. But just as they begin to realize the magnitude of their discovery, Princeton's snowy campus is rocked: a longtime student of the book is murdered, shot dead in the hushed halls of the history department.

A tale of timeless intrigue, dazzling scholarship, and great imaginative power, The Rule of Four is the story of a young man divided between the future's promise and the past's allure, guided only by friendship and love.

Amazon.com Product Description (ISBN 0743552121, Audio CD)

THE RUNAWAY NEW YORK TIMES BESTSELLER AT A NEW LOW PRICE!

THE RULE OF FOUR

Ian Caldwell & Dustin Thomason

Read by Josh Hamilton

It's Easter at Princeton and two students, Tom Sullivan and Paul Harris, are a hair's breadth from solving the mysteries of the Hypnerotomachia Poliphili -- a renowned text attributed to an Italian nobleman, a work that has baffled scholars since its publication in 1499. But as their deadline looms, research has stalled -- until a long-lost diary surfaces with a vital clue. And when a fellow researcher is murdered just hours later, Tom and Paul realize that they are not the first to glimpse the Hypnerotomachia's secrets.