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.

Gladia Delmarre's homeworld, the Spacer planet Solaria, has been abandoned - by its human population. Countless robots remain there. And when traders from Settler worlds attempt to salvage them, the robots of Solaria turn to killing ... in defiance of the Three Laws of Robotics. Pax Robotica Long ago, Gladia's robots Daneel and Giskard played a vital role in opening the worlds beyond the Solar system to Settlers from Earth. Now the conscience-stricken robots are faced with an even greater challenge. Either the sacred Three Laws of Robotics are in ruins - or a new, superior Law must be established to bring peace to the galaxy. With Madam Gladia and D.G. Baley - the captain of the Settler traders and a descendant of the robots' friend Elijah Baley - Daneel and Giskard travel to the robot stronghold of Solaria ... where they uncover a sinister Spacer plot to destroy Earth itself.