Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Worst book on Gettysburg yet

Every once in a while, a new book appears on a Gettysburg-related topic that makes it evident that the author knows next to nothing about the subject. A few really bad ones have appeared recently - one being Paul Walker's stinker of a book about the fight at East Cavalry Field on July 3. As if that weren't enough, here now is Carhart's contribution to the scrap heap of lousy, factually incorrect and poorly written pieces of tripe about Gettysburg. Every time I've written a detailed, negative review of this book here on Amazon, the powers that be have chosen to remove it. Instead of giving yet another litany of why this book is a waste of the paper its printed on, let me refer you to this review of this book on Civil War News: http://www.civilwarnews.com/reviews/bookreviews.cfm?ID=810. It says all that needs to be said. Instead of buying this book, buy a rubber chicken - you will have something of much more value in your hands.