Instruct: Classify Amazon reviews into positive or negative sentiment
Query: good resource

I give Civil War lectures; and I am always on the lookout for good reference books. I have all three of Annie Abel's books on Native American involvement in the war. While her writing style is a bit dry, more like reading a thesis than a book, her books are chock full of valuable information. A lot of footnotes that include original letters from the players of the time. A great book for someone looking for information in detail and has a good attention span.