The content of this book is very good and clearly explains the basics, building up using examples of different industries. I found it a good foundation to understanding the basics behind an Analytics warehouse.
However, the poor rating is due to the Kindle edition of this book being poorly formatted from the printed version. There are numerous typos which give it messy grammar or in worse cases, change the meaning of the sentence. Bulletpoints appear as large 1/4 page filling icons, without the text beside them. The book still advertises the free CD, despite this not being in the Kindle edition, (or even adapted for it). Despite all this, the Kindle book still commands a higher price than the printed versions.
Until they properly proof-read and format this book for the Kindle, I suggest you buy the paper copy.