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

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.

In this thematic sequel to Gregory Benford's award-winning bestseller Timescape , a history professor finds that he is able travel back to 1968, the year he was sixteen--here, he finds a slew of mentors with the same ability, including Robert Heinlein, Albert Einstein, and Philip K. Dick.

A small human band flees from an enemy it cannot hope to combat--superior artificial minds in great insectlike machines.

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.

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...