Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Worthless

I found this book at a local used book store and at first it looked like a great deal. I found the first exercise difficult to follow because some steps have been left out. The second one wasn't much better and I became frustated. At first I thought it was me, but when I looked it up on Amazon.com I discovered that everybody was having trouble with the book. That's when I threw my book into the garbage can.Next time I'll read the reviews at Amazon.com before buying a Photoshop book!