Ebook: Mastering Data Warehouse Design: Relational and Dimensional Techniques

While I have read a lot of books on this topic, this one goes above and beyond all. The emphasis on the practical aspects of how to implement a data warehouse was extremely useful, since all the steps are clearly laid out.
More than being a theoretical text, this book acts a practical guide to datawarehouse design and implementation.
The language is also easy to follow and the recommended readings/bibliography points to some excellent resources.