Instruct: Classify Amazon reviews into positive or negative sentiment
Query: An incomplete set

Amazon doesn't tell you that this book is Volume 1 of 2. Additionally, when you receive the book and find out it is 1 of 2, you can't buy Volume 2. Apparently what is needed is the following ISBN, which is supposed to contain both volumes: 1-58976-287-8. Very poor identification on the Amazon website.