Now, enter the world of Neanderthal...The expedition of the century...uncovers the find of the millennium...Neanderthal.In the remote mountains of central Asia, an eminent Harvard archeologist discovers something extraordinary. He sends a cryptic message to two colleagues. But then, he disappears.Matt Mattison and Susan Arnot-- once lovers, now academic rivals-- are going where few humans have ever walked, looking for a relic band of creatures that have existed for over 40,000 years, that possess powers man can only imagine, and that are about to change the face of civilization forever.

    Assigned to accompany them is a band of Cossacks, Russia’s elite horsemen and warriors. From the first day, distrust between the two groups disrupts the cattle drive. But as they overcome hardships and trials along the trail, a deep understanding and mutual respect develops between the men in both groups.

    Marshal Apostle Richardson enforces the law, he doesn't decide it. When a posse tries to lynch Almena ahead of her trial, Apostle refuses their form of expedited justice--and receives a bullet for his trouble. Almena spares him through the use of dangerous flesh magic but escapes soon after saving him.Weeks later, Apostle fears the outlaw queen has returned to her old ways when she's spotted terrorizing Kansas with a new gang in tow. When cornered, however, Almena makes a convincing case for her innocence and proposes a plan to take the real bandits down.Working with a known killer opens Apostle up to all sorts of trouble, not the least being his own growing attraction toward the roguish woman. Turning Almena away from vengeance may be out of the question, but if he doesn't try, she'll wind up right where the law wants her: at the end of a rope.And if Apostle isn't careful, he'll end up joining her.

    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 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.