Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Thank you, Silverberg

I bought this book many, many years ago and still have it. With my Kindle, I hardly ever re-read any of my paperbacks anymore because it's less convenient. I always liked this story and had read it several times over the years. It was fun to pick it up free to read again without giving up the convenience of my Kindle. It's a happy beginning, ending and beginning. Great entertainment away from the real world for someone that loves Science Fiction.