A collection of twenty classic short stories by Isaac Asimov, author of the Foundation series, featuring the definitive and only in-print version of “Nightfall” From one of history’s most influential writers of science fiction comes this collection of twenty short works of fiction...

In the twenty-second century Earth obtains limitless, free energy from a source science little understands: an exchange between Earth and a parallel universe, using a process devised by the aliens. But even free energy has a price. The transference process itself will eventually lead to the...

This classic science fiction masterwork by Isaac Asimov weaves stories about robots, humanity, and the deep questions of existence into a novel of shocking intelligence and heart. “A must-read for science-fiction buffs and literature enjoyers alike.”—The Guardian I, Robot, the first and...

Welcome to Ringworld, an intermediate step between Dyson Spheres and planets. The gravitational force created by a rotation on its axis of 770 miles per second means no need for a roof. Walls 1,000 miles high at each rim will let in the sun and prevent much air from escaping. Larry Niven's novel, Ringworld, is the winner of the 1970 Hugo Award for Best Novel, the 1970 Nebula Award for Best Novel, and the 1972 Ditmars, an Australian award for Best International Science Fiction.

“A totally new and original work that stretches his talents to their fullest . . . welcome back, champ!”—The Detroit News In the twenty-third century pioneers have escaped the crowded earth for life in self-sustaining orbital colonies. One of the colonies, Rotor, has broken away from the...