Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Don't waste your money

This book, like many others pertaining to this subject matter on the market today, is outdated. I have purchased quite a few books written by various authors on this particular subject matter and have come to the conclusion that if you want current, VALID, information it is best to check the publication date prior to purchasing.As a rule of thumb, if the book was published prior to 2006, don't waste your time and money. As always, there are exceptions to this rule, but they are few and very far between.