Instruct: Classify Amazon reviews into positive or negative sentiment
Query: This book is crap!

The author of this book, Robert Hagstrom, has never spoken to Mr. Buffett about investing. Yet for some strange reason Hagstrom feels qualified to write about Buffett's investment methods. After the book came out Hagstrom started a mutual fund to exploit his readers' trust, Hagstom claimed that he was going to use Buffett's methods as outlined in this book. But Hagstrom's mutual fund turned in such poor results he had to close it down. If you use the investment methodology found in this book you too will get the same poor results that Hagstrom did. If you want to know how Buffett did it, you should look elsewhere.