My #top100 #scifi Num:49 Robots and Empire

Amazon: http://amzn.to/2fW12ch

Another Asimov classic. This one ties the Robots series and the Empire series together. One of my favourites. Daneel and Giskard wrestling with the laws of Robotics, basically the ethics of AI. 
Lots of philosophy, but not too heavy, and plenty of Space Opera to liven things up.