One book. Two readers. A world of mystery, menace, and desire.

A young woman picks up a book left behind by a stranger. Inside it are his margin notes, which reveal a reader entranced by the story and by its mysterious author. She responds with notes of her own, leaving the book for the stranger, and so begins an unlikely conversation that plunges them both into the unknown.

The Book: Ship of Theseus, the final novel by a prolific but enigmatic writer named V. M. Straka, in which a man with no past is shanghaied onto a strange ship with a monstrous crew and launched onto a disorienting and perilous journey.

The Writer: Straka, the incendiary and secretive subject of one of the world’s greatest mysteries, a revolutionary about whom the world knows nothing apart from the words he wrote and the rumours that swirl around him.

The Readers: Jennifer and Eric, a college senior and a disgraced grad student, both facing crucial decisions about who they are, who they might become, and how much they’re willing to trust another person with their passions, hurts, and fears.

S., conceived by filmmaker J. J. Abrams and written by award-winning novelist Doug Dorst, is the chronicle of two readers finding each other in the margins of a book and enmeshing themselves in a deadly struggle between forces they don’t understand. It is also Abrams and Dorst’s love letter to the written word.

The Last Cato is a masterful blend of Christian scholarship and thrilling adventure. This novel delves into the race to find the secret location of the Vera Cruz, the True Cross on which Christ was crucified, and the ancient brotherhood sworn to protect it.

Holy relics are disappearing from sacred spots around the world, and the Vatican will do whatever it takes to stop the thieves from stealing what is left of the scattered splinters of the True Cross. Brilliant paleographer Dr. Ottavia Salina is called upon by the highest levels of the Roman Catholic Church to decipher the scars found on an Ethiopian man's corpse: seven crosses and seven Greek letters.

These markings, symbolizing the Seven Deadly Sins, are part of an elaborate initiation ritual for the Staurofilakes, the clandestine brotherhood hiding the True Cross for centuries, led by a secretive figure called Cato.

With the help of a member of the Swiss Guard and a renowned archaeologist, Dr. Salina uncovers the connection between the brotherhood and Dante's Divine Comedy, racing across the globe to Christianity's ancient capitals. Together, they face challenges that will put their faith—and their very lives—to the ultimate test.

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 beginning 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 Princeton, 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.