In this collection, one of the great classics of science fiction, Asimov set out the principles of robot behavior that we know as the Three Laws of Robotics. Here are stories of robots gone mad, mind-reading robots, robots with a sense of humor, robot politicians, and robots who secretly run the world, all told with Asimov's trademark dramatic blend of science fact and science fiction.

Two minutes before he disappeared forever from the face of the Earth he knew, Joseph Schwartz was strolling down the pleasant streets of a Chicago suburb, thinking about his family, He was a simple man, a kind man, a practical man not given to wild flights of imagination. So when he saw the old Raggedy Ann doll lying in his path, he merely smiled and lifted his foot to step over it... That was the only thing he remembered. He did not know that it marked the last act of his life on this earth - and the beginning of a terrifying journey into a strange new world where the twentieth century was already ancient history.

The history of a small, semicivilized tribe who rose from obscurity and in 500 years created the greatest and most peaceful empire in the Western world

CONTENTS: MECANICA by Frank Edward Arnold THE MARTIANS ARE COMING by Robert W. Lowndes CRYSTAL WORLD by John L. Chapman THE MAN FROM THE FUTURE by Donald A. Wollheim RETURN FROM M-15 by S. D. Gottesman PLANET LEAVE by Clifton B. Kruse THE SECRET SENSE by Isaac Asimov WORLDS IN EXILE by Elton V. Andrews THE LAST VIKING by Hugh Raymond AMBITION by Wilfred Owen Morley PURPLE DANDELIONS by Millard Verne Gordon THE ROCKET by Damon Knight THE REVERSIBLE REVOLUTIONS by Cecil Corwin BIPED by Basil Wells