I, Robot: The Three Laws Of Robotics – 1. A robot may not injure a human being or, through inaction, allow a human being to come to harm.  2. A Robot must obey orders given to it by human beings except where such orders conflict with the First Law. 3. A robot must protect its own existence as long as such protection does not conflict with the First or Second Law…These laws are meant to ensure mankind’s supremacy – even when the robots seem more human than people.  But what if the Three Laws can be contravened?                                               Robots And Empire: Gladia Delmarre’s homeworld, the Spacer planet Solaria, has been abandoned by its human population. Countless robots remain there.  And when traders from the  Settler worlds attempt to salvage them, the robots of Solaria turn to killing, in defiance of the Three Laws of Robotics. 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 a greater challenge. Either the Three Laws are in ruins – or a new superior Law must be established to bring peace to the galaxy.  With Gladia, Daneel and Giskard travel to the robot stronghold of Solaria, where they uncover a sinister plot to destroy Earth.