Instruct: Classify Amazon reviews into positive or negative sentiment
Query: THE book you must have.

If you never own another book on investing and preserving your hard earned life savings, this is the one. As a complete novice, I needed the straight honest advice in this book and the permission to take control of my own money. As a single mom struggling to retire, Al's book helped me manage my 401K last year and I got out of the market in time to save everything. This book is invaluable at a time when there is no one left to trust with your money but you. It is a very readable, funny, and insightful book that any idiot can follow. Thank you from the bottom of my heart, Al Thomas.