When an experiment with a new type of robot brain goes awry, the result is the creation of Caliban, a conscienceless robot that is not monitored by the Three Laws of Robotics that keep humans safe. Reprint.

A second work in a trilogy that examines Asimov's Three Laws of Robotics finds Caliban, the only robot without guilt or conscience, suspected in the murder of a politician and challenged to lead the New Law robots in a rebellion that threatens humanity. Reprint.

Third in a powerful trilogy that examines Asimov's Three Laws of Robotics—a challenge welcomed and sanctioned by Isaac Asimov, and written with his cooperation.