The author is an IBM veteran who spent more than 20 years in the sales and product support divisions, except for a short period in a company specialized in Data Warehousing, so he naturally puts in this book a lot of his experiences and he also describes the history of BI in terms of architectures and technologies.
I had the impression that the target audience is mainly made by managers involved in BI projects, on either sides (vendors, consulting companies, customers).
One obvious comment from an Italian like me is that, like with many other books written in the US, the average size of the projects described in this book is rather large compared to what we are used to, and could only be applied to a handful of companies here in Italy.
The best feature of the book is the large number of real life examples that it contains. This can be a real help for a manager of a company who doesn't know the risks connected with BI projects and wants to learn from the many (and sometimes very costly) errors made by other people and companies in similar situations.
Under this aspect the book contains a lot of common sense and is a good reading, but don't look in it for innovative contents or for clear explanations of key technologies, buzzwords and project methodologies.
In most cases the book is limited to describe different situations (usually problematic), and to give some advise, without really delving into technical details.
Often I saw the author asking himself several questions about the typical problems that are encountered in a BI project, but then I couldn't find the answers.
Although there are no references to specific products, in more than one occasion it seems that the fact that the author comes from IBM comes to the surface, like when he prefers the "single provider" approach versus the "best of breed" (Chap. 4), or when he talks about the qualities of the mainframe as opposed to distributed environments (chap 7).
In conclusion, is this book worth reading? I have to say that whenever I read a book about BI and Data Warehousing I can't avoid comparing it with the books from Mr Kimball, which I consider the absolute reference in the field. This might not be fair, but it makes sense, since our time is limited, to read only those books that add something new to what we already know.
In this case the answer is yes, but only for a specific target, i.e. managers of companies who are about to start their first BI project. The rest of the project team would probably find most of the information in this book not very useful.