Instruct: Classify Amazon reviews into positive or negative sentiment
Query: An very complete book!

This book is full of information, and is for those who seriously want to speak the language of Serbia, Croatia, Bosnia and Montenegro. It addresses grammatical, vocabulary, and alphbetical differences of the two main dialectical variations - Eastern and Western (though I wish they would refrain from using the labels "Croatian" and "Serbian").The book covers vocabulary and expains the language in detail. It includes an extensive glossary and a number of essays for reading practice. It goes way beyond the basic tourist phrases.Though it can be a bit dry and doesn't take the snappy, fun approach of some other language instruction books, it is very useful, clear, and compete. A rarity for books on this language.