Instruct: Classify Amazon reviews into positive or negative sentiment
Query: There's better books for both topics this book covers

It's a pretty good dictionary if you want to find out what somthing is in the lord of the rings books or somthing similar, but if you want to find out about the language and how to write it or speak it, you might as well pick up the Return of The King Appendix E and look at that. If you want to know good info about the language, search the internet. A good middle earth dictionary is the Complete Guide to middle Earth by Robert Foster. All in All, this is not a very good book.