Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Poor quality

Worst-quality "text book" I've ever read and, with six years of higher education, I've read a lot of text books. There are multiple typos, grammatical errors, and mis-spelled words. Even worse, a lot of the text doesn't make any sense. A subsequent paragraph often contradicts its predecessor, for example. I'm going to call Dearborn's "help line" with all of the questions/clarifications that I've marked throughout this book. It will probably take an hour to get through all of them. The only good thing I have to say about it is that it's organized well. Overall, I do not recommend Dearborn's publications.