Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Teach Yourself Panjabi

I like the book...However, when I opened it and started to read the information...I found out that there is a cassette tape that is supposed to be used with it.Unfortunately...Amazon does not sell the corresponding cassette tape. McGraw Hill only sells it as a complete set (Book & Tape)So, if I want the tape, I will have to buy another book.