This is not just a exam prep. This is something more than that. You can learn for exam as well. If you love to start learning Data warehousing with SQL Server, you can go with this book. This book gives you a good start for sure. I love Microsoft Press exam training kits because they have nice questions and explained answers which you can measure yourself.
This book is available as ePub, Mobi, PDF. So you can think about purchasing ebook also.
You can buy this book from here : http://shop.oreilly.com/product/0790145345219.do