Instruct: Classify Amazon reviews into positive or negative sentiment
Query: A good book for gun appraisers and collectors alike

This book is pretty informative. It goes indepth into the history of individual firearms as well as giving a price range per respective condition. Only thing they don't tell you is that many standard military weapons are not included in this edition.Inorder to evaluate those you have to purchase the Standard Catalog of Military Firearms.If you aren't so much interested in Military firearms then this is the book for you.