Instruct: Classify an Amazon review into positive or negative sentiment.
Query: De Goes continues on cheating street

I bought a previous book from the author, when I was intending to buy the black art book and boy was I dissappointed. In that book there was source, but it all(full screen) used ancient Borland graphics addition that was not available anywhere below 500$. There was no mention of this little fact but in the middle of the book. Nothing on the back cover - no. Nothing in 20 first pages - no. Nothing on the cover - no. All was just waste of time other than general 3D bla bla bla that's available everywhere. I remember writing an angry(but decent) email to the author. He never replied.