Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Poor Quality Control; Many Errors

The product is sub-par. There was no quality control, no review of the text. There were numerous errors, especially spelling errors. Just because you can run a spell check and get it to pass does not mean that the words are correct. Poor, poor quality. If you won't spend the money and time to produce a good product, I won't be spending my money on Amazon books in the future.