Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Perhaps a little quality assurance

The information presented in the book is useful, however there are a number of the test questions that are typed incorectly and formatted incorrectly and in one case the letter of the answer differs from the explanation of the answer. Its almost as if there was a rush to get this in print. There are a few inconsistencies between this book and the other major study guides and this can cause confusion. My main complaint is the number of errors within the book. The content itself is helpful, not the be all and end all but useful for review nonetheless.