Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Ancient Engineers were much smarter than you think.

Have you ever wondered how they built the pyramids? Or the Colossus of Rhodes? Or those huge walls, aqueducts or temples? Sprague de Camp shows in a very entertaining and engaging manner how the ancients were as intelligent as we are today and many a lot more so. They didn't have modern technology but they did have ample curiosity, ingenuity and derring-do. A must read for anyone interested in history.