Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Excellent book

If you begin a journey of analyzing time series this is the book for you. Excellent book for every student - you must have and read it. I highly recommend, not to mentioned the fact that at the Web site of Prof. Rob J Hyndman are the data and "forecasting bundle of R packages provides new forecasting methods, and graphical tools for displaying and analysing forecasts" methods explain in that book.