In the spaceship, Argo, humans flee machine creatures determined to exterminate them. The escape route takes them dangerously close to a black hole where they discover the remains of an ancient human civilization and a way of defeating the mechs. By the author of Great Sky River.

Escaping from the unbending constraints of Earth in the company of a brilliant beast, a young woman soon discovers that Alien agencies have mastered the ability to span parallel universes, which are undetectable by man-made devices.

The final Galactic Center novel, in which a young warrior-in-training must work with his father and grandfather to prevent a violent artificial intelligence from destroying the human race.

Hundreds of scientists travel to the distant star, Ra, in the world's first true interstellar spaceship.

In a futuristic galactic empire, a man and his robot wife escape from their enemies by transferring their minds into the bodies of animals. By the author of Sailing Bright Eternity.

"Humanity has established a SETI library on the moon to decipher and interpret the many messages from alien societies we have discovered. The most intriguing messages are from complete artificial intelligences. Ruth, a beginner Librarian, must talk to alien minds who have aggressive agendas of their own. She opens doors into strangeness beyond imagination and in her quest for understanding nearly gets killed doing it"-- Provided by publisher.

A human expedition to another star system is jeopardized by an encounter with an astonishingly immense bowl-shaped structure cupping a star, with a habitable area equivalent to many millions of Earths. Investigating the Bowl, or Shipstar, the human explorers are separated, with one group captured by the gigantic structure's alien inhabitants and the other pursued across its strange and dangerous landscape.

The authorized sequel to Arthur C. Clarke's science fiction classic Against the Fall of Night, set on a dying planet Earth millions of years in the future. In Against the Fall of Night, a young man named Alvin ventures beyond the domed city of Diaspar to explore a planet Earth left nearly barren by a centuries-old cataclysm. What he discovers is the thriving rural civilization of Lys and an insane non-corporeal being known as the Mad Mind-a danger...

An accidental explosion in a laboratory creates a wormhole, a space-time tunnel, which black physicist Alicia Butterworth uses to visit another universe. Time is so fast in this other world, Alicia can observe cosmic evolution as it happens. By the author of Sailing Bright Eternity.

A human expedition to another star system is jeopardized by the discovery of an immense bowl-shaped structure in space that leads to hostile alien encounters and profound revelations about humanity's place in the universe.