Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Is this one of those "based-on-the-beta-release" books?

I found this book on the bargain rack for half it's cover price...It still wasn't worth it. During the step-by-step the author skips steps. When he says to click an option, it isn't there. He may be referring to the bar menu choices, the right-click choices or PSPs "exploding window" choices, but you are not going to know. Anybody want to buy a slightly-used PSP book?...You can't have mine - I threw it in the trash.