For Captain Charles Hunter, gold in Spanish hands is gold for the taking, and the law of the land rests with those ruthless enough to make it. Word in port is that the galleon El Trinidad, fresh from New Spain, is awaiting repairs in a nearby harbor. Heavily fortified, the impregnable harbor is guarded by the bloodthirsty Cazalla, a favorite commander of the Spanish king himself. With backing from a powerful ally, Hunter assembles a crew of ruffians to infiltrate the enemy outpost and commandeer El Trinidad, along with its fortune in Spanish gold.

In an Arizona desert a man wanders in a daze, speaking words that make no sense. Within twenty-four hours he is dead, his body swiftly cremated by his only known associates. Halfway around the world archaeologists make a shocking discovery at a medieval site. Suddenly they are swept off to the headquarters of a secretive multinational corporation that has developed an astounding technology. Now this group is about to get a chance not to study the past but to enter it.

The year is A.D. 922. A refined Arab courtier, representative of the powerful Caliph of Baghdad, encounters a party of Viking warriors who are journeying to the barbaric North. He is appalled by their Viking customs - the wanton sexuality of their pale, angular women, their disregard for cleanliness...their cold-blooded human sacrifices. But it is not until they reach the depths of the Northland that the courtier learns the horrifying and inescapable truth.

A classic thriller from #1 New York Times bestselling author Michael Crichton, Sphere is a bravura demonstration of what he does better than anyone: riveting storytelling that combines frighteningly plausible, cutting-edge science and technology with pulse-pounding action and serious chills.

The United States government is given a warning by the preeminent biophysicists in the country: current sterilization procedures applied to returning space probes may be inadequate to guarantee uncontaminated re-entry to the atmosphere.