John W. Foreman

Beware: this is not an introductory book. IT assumes knowledge in math and Excel. So, even though, the book is code-free (minus a few - not enough for my taste - R replication of the examples in Excel), it does involve building complex formulas and using advanced Excel functions.
Side note: there is also a quick and dirty introduction to Gephi for network visualization.

Outstanding introduction to the concepts of data science using Excel and practical examples. Will give the beginner the confidence to dive into more complex material after reading this book. Great sense of humor.