Instruct: Classify an Amazon review into positive or negative sentiment.
Query: Undoubltably one of PA's finest and one Sci-Fi's finest

So much to say. The characters are not just deep but convoluted with a complexity that would make fine subject matter for a novel unto itself. That is only the beginning of this book however, the Macroscope is a fantastic invention of PA's imagination and the none of the socio-political implications that such a device would have on society are missed in PA's treatment of it. As the book winds forward we experience a many different adventures each of which are complete stories themselves. The book has a refreshingly scientific treatment of inter-galactic space travel and the problems involved with it. All around one of my favorite books of all time.