I purchased this book with the expectation that it would help me prepare for the exam. The CD provides practice exams and other resources to give one the impression they are on their way to certification. However, there are numerous errors in the book as well as on the CD, particularly with the "Edge Test" software, which incorrectly grades tests and does not allow users to select the right answers. This issue is actually moot, since the practice tests actually do not address problems presented in the certification exam. I recommend using the on-line resources affiliated with the testing organizations. They also provide discounted vouchers.
