Instruct: Classify a given Amazon review into positive or negative sentiment.
Query: A good start to an interesting economic history

For those interested in technological history this is a great book to start with. While it may look daunting this book analyzes the social, political and technological implications of building a railroad that spans the country. It looks at the corruption and mismanagement of workers as well as looking at how the country benefited from being made whole. This is a great place to start for understanding the United States economic rise to power after the Civil War.