Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Hoax: Beware

Do not fall prey to this ridiculous hoax. As one reviewer notes below, THIS BOOK IS A JOKE (as the names of the authors should tell you). Not only is this book useless, but its entire sales apparatus (from the website to these very reviews [mainly written by the authors themselves, which you can tell by noting that anyone giving it five stars has reviewed ONLY this book and nothing else at all on Amazon])is designed to suck you in. You would be very hard-pressed to find one serious graduate student who has read this book and found it to be useful.