is a fixup novel of sci-fi short stories or essays that originally appeared in magazines. These stories feature the character of Dr. Calvin, chief robopsychologist at U.S. Robots and Mechanical Men, Inc., the major manufacturer of robots.
In the waning days of the Galactic Empire, mathematician Hari Seldon spends his life on a theory of psychohistory, as a new and effective mathematical sociology. Using the laws of mass action, it can predict the future of populations.
is a detective story and illustrates an idea Asimov advocated, that science fiction can be applied to any literary genre, not limited within itself. It is a much earlier part of an extensive Future history leading up to the rise of the Galactic Empire.
is a discontinued series intended to form a definitive collection of Isaac Asimov's short stories and novellas. Altogether 88 of Asimov's 383 published short stories are collected in these two volumes.
is a work of nonficion progressing roughly through the evolution of astronomy and discovery into more complex topics, from planetary orbit to the formation of stars, and the characteristics of quasars and black holes.
Those who inhabit a parallel universe with different physical laws, exchange matter from their universe
with ours, seeking to exploit the difference in physics,
thus providing them an alternative energy source.
Two youngsters discover a crash-landed spaceship, then decide to make pets of the occupants. After all, the circus is coming to town and this can make them famous. Parents interfere, and the aliens are sent off, but this is not the end...
Biron Farrell was young and naïve until a radiation bomb, planted in his dorm room, changed him from an innocent student at the University of Earth into a marked man, fleeing desperately from an unknown assassin.