Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Be forewarned.

At first, I really liked this book. I didn't care about the cheap materials used to make it, because I only paid about [...] bucks for it. Then at about page 92 or so, it all of a sudden skipped back to page 33!! I was missing about 32 pages of material that had been replaced with material from earlier in the book! I was so pissed I could scream! I want to get a legit copy of this, because mine was so worthless I threw it into the garbage. Just to let you know, this is the only book with which I have ever had this problem.