Instruct: Classify Amazon reviews into positive or negative sentiment
Query: This book was a waste of money.

After taking the Server & Workstation Core exams with a combination of the MS Press books and this series, I was all set for some good assistance with the Exchange book from this publisher. I was extremely disappointed by the content of this book.Not only is the book very short on information in several key areas, it also lacks any significant coverage of exam essentials like clients. The small overview given of clients is not enough to prepare someone for the exam.As if the lack of essentials wasn't enough, the book is incorrect in at least one exam question! In a question regarding trust levels, this book is in direct conflict with Microsoft's own Exchange Server 5.5 book. That was in the Chapter 2 exam. It's anyone's guess what other nuggets like that one are awaiting the reader in this book.I wish I could say that I'm going to buy another book in this series for my last exam, but after this fiasco I'm not going to give them any more of my money.