Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Essential, classic, indispensable

This is without question the most important book on the Chinese writing system published in the last century, and it is one of the most important books on the Chinese language.The main goal of the book is to explain how the Chinese writing system works, and to dispel commonly held beliefs such as that the Chinese writing system conveys thought directly without the intermediary of sound.Anyone with a serious interest in the Chinese language or Chinese linguistics, or the general topic of writing systems, cannot consider themselves worth listening to unless they have grappled with the arguments in this book.Anyone who is studying Chinese casually would do very well to read it; it's written in a very easy to read and accessible way without jargon.