Instruct: Classify a given Amazon review into positive or negative sentiment.
Query: Fantastic reference; great value

Unlike many reference books that cover similar material, this book is not too large, heavy or cumbersome to actually use. The paper quality is nice. I love that I can get it in paperback so it's affordable for a reference book. The maps are excellent - I often scan them to show to my class as they're better than the maps in their textbooks. The text provides a synopsis of the era and is just the right length and detail level. Oh, and it even has a thorough index - a must in a reference book but is often substandard in other works.I only wish there was a more recent edition!