Arthur C. Clarke – Imperial Earth
The protagonist was raised on a small colony on Saturn’s moon Titan, and is one of its political leaders. He makes a trip to Earth for diplomatic business and while there, happens upon a scientific discovery that could change civilization forever. The cultural dynamics, technology, and travel in the early parts are thought-provoking, as is the meditation of the ethics of human cloning. The story also has the fun quality of a murder mystery in the later parts.