We're doing an oracle business intelligence implementation at the office and I thought it would be a good idea to get this book to have a better understanding of the whole data analysis/statistics field. Many people think Business Intelligence is all about graphs. Look at one graph, then look at the next one. But this book helps to rubbish that notion. It was funny because even supposedly minor subjects like mean, median and mode were discussed in a way that I believe has made me much smarter because I can tell when to use which. Even an average is not always what it seems. I recommend this book to anyone working on a BI implementation. My only complaint is a few minor calculation mistakes, but the book is so much fun that it doesn't really matter in the end. 5 stars for me.