This book targets consultants, who want to cross-check their knowledge, before they take their multiple choice test for the SAP-BW-Certificate. It does contain the orginal Multiple-Choice-Tests for SAP-BW 2.1., and it does contain information on SAP-BBW. It is useful, but you should consider the following shortcomings:
(1) This book is on SAP-BW 2.1, but the most up-to-date release is 3.1. There were many changes since then
(2)If you are just a BW-User, who wants to know, which button to push and which report to start, you should consider other books.This book has got few screenshots and it is definitely not for novices. You can use it, to test knowledge,but it is not comprehensive enough, to teach new knowledge.
(3) If you are a systems administrator or a practitioner, who wants in depths technical information, but who does NOT want a certificate, you should consider other books.
Examples: Kevin McDonalds book on BW or a german publication by Christian Mehrwald (SAP BW Relase 3.0)published by dpunkt-Verlag (Mehrwalds book was written in german and to the best of my knowledge it has not been translated yet, though it is the best book on that topic I know) .
With all due respect towards Mrs Roze, her book is rather thin (260 Pages), does use a large letter type, has got many blank spaces and devotes 20-30% on very general topics (OLTP versus OLAP, Exam preparation etc). The structure of the book is rather erratic. I got along with it, as I have got experience, but a novice might be forced to flip pages forwards and backwards a lot. Moreover, this book does not contain that type of hands-on-advice on administration, that can be found in more advanced books on BW. The scientific content of the chapters varies a lot.
Some are too simple, others discuss very esoteric topics, which you hardly need, except in your exam. Even if you are lucky and pass the test, because you memorize all questions, this is not enough to use BW in you daily work.
(4) I agree with the previous reviewer, that there are mistakes in the multiplechoice-tests, that some answers are definitely wrong, and that some tests ask for information, that one can not find in the corresponding chapter.
SUMMARY: This book is still useful, but only for experienced consultants, who want to get their SAP-BW-Certificate,and moreover it has got some serious flaws.