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Earth is threatened by the invasion of an interstellar research probe gone mad, in a study of the complex interactions--and their ramifications--between human passions and the inflexible equations of science.

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Calculating God

By Robert J. Sawyer

In the near future, an alien craft lands outside the Royal Ontario Museum in Toronto. A six-legged, two-armed alien named Hollus relates to paleontologist Tom Jericho that the Earth, Hollus's home planet, and the planet of another alien species all experienced the same five cataclysmic events that prove the existence of God.

Rendezvous With Rama

By Arthur Charles Clarke

During the twenty-second century, a space probe's investigation of a mysterious, cylindrical asteroid brings man into contact with an extra-galactic civilization

Rama II

By Arthur C. Clarke

“This is a space trip that no reader will want to miss.”—Playboy Years ago, the enormous, enigmatic alien spacecraft called Rama sailed through our solar system as mind-boggling proof that life existed—or had existed—elsewhere in the universe. Now, at the dawn of the twenty-third century, another ship is discovered hurtling toward us. A crew of Earth's best and brightest minds is assembled to rendezvous with the massive vessel. They are armed with everything we know about Raman technology and culture. But nothing can prepare them for what they are about to encounter on board Rama II: cosmic secrets that are startling, sensational—and perhaps even deadly. “Offers one surprise after another.”—The New York Times “A masterpiece . . . one of the year’s best hard SF epics.”—The Houston Post

Rama Revealed

By Arthur C. Clarke

On its mysterious voyage through interstellar space, a massive alien starship carries its human passengers to the end of a generations-long odyssey. But the great experiment designed by the Ramans has failed, and Rama III has become a battleground. Fleeing a tyrant, a band of humans ventures into the nether regions of the ship, where they encounter an emerald-doomed lair ruled by the fabulously advanced octospiders. As the octospiders lure the humans deeper into their domain, the humans must decide whether the creatures are their allies of enemies. All the while, Rama III continues its in-explorable journey towards the node, where the climax of their voyage awaits the stunning revelation of the true identity of the beings behind this glittering trek across the cosmos.

The Garden of Rama

By Arthur C. Clarke

In the spellbinding Arthur C. Clarke tradition, here is an exhilarating adventure into the hearts of both the Universe and mankind . . . By the twenty-third century Earth has already had two encounters with massive, mysterious robotic spacecraft from beyond our solar system—the incontestable proof of an alien technology that far exceeds our own. Now three human cosmonauts are trapped aboard a labyrinthine Raman vessel, where it will take all of their physical and mental resources to survive. Only twelve years into their journey do these intrepid travelers learn their destination and face their ultimate challenge: a rendezvous with a Raman base—and the unseen architects of their galactic home. The cosmonauts have given up family, friends, and possessions to live a new kind of life. But the answers that await them at the Raman Node will require an even greater sacrifice—if humanity is indeed ready to learn the awe-inspiring truth.