content: This "book" is nothing of the sort. It is a collection of test questions and practice labs. The questions in general are not as specific as the questions on the real CCIE test. What this is, is a metric. The CD will test you and let you know where you need to study. The explanations of the answers are mostly good, but not in debth enough to stand as the only study tool you use. If you buy this book, use it as a measuring tool, not a study guide. By using this and studying Cisco's books, I passed the written on my first try. But then I also have 10 years of experience in the field.I haven't tried the practice labs yet, but will post again after I do.