Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Space adventure/mystery as only Dr. A can deliver...

Of course this is science fiction and quite notable science fiction at that. But in the hands of Isaac Asimov, it's also a mystery although not in the style of the first three robot novels. Somebody used a psychic probe on an Earthman, wiping out his memory, and dumped him in a small village on the planet, Florina. The woman who takes charge of him and the village's townsman eventually team up as the man begins regaining memory, and all become embroiled in political machinations. We're introduced to the planet Trantor, the center of the Galactic Empire.While this is the last of the Empire trilogy written by Asimov, it's the earliest in the fictional time sequence, occuring in an era much later than that era covered in the Robot novels.This is an engaging, tightly written novel with twists which will keep the reader involved.