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

i will never purchase anything from this seller again. i asked for my money back and he did not retunr it. stated he didnt even know the return process. after i asked for a return he never responded to my emails again.i was highly upset. i accidently purchsed the wrong book so i was stuck with something i didnt use.other than that had it been the right one it would have helped me out in my class.