Instruct: Classify a given review into positive or negative sentiment.
Query: The best book on the subject available today

Written by an expert in this field "Process Analyzer Technology" is simply the best book in this subject on the market today. Other organizations have tried to compete with this book and failed to do this complex subject, justice. Ken Clevett is an enthusiast as well as an expert on process analyzers and makes the subject come alive for both newcomers to the field and experienced personnel in this complex and technologically advanced subject. All in all a book I am pleased to have on my bookshelf at the office and plant, and a book I use for reference when I need just the right technical answer.