Looking for Advanced Excel training books with tutorials and data files.

I have use the Excel New Perspectives book from Cengage Learning for teaching purposes for years. I really like the book because it provides step by step instruction for the tutorials. However, I am interested in learning more about advanced Excel features. Does anyone have any recommended training books or methods that provide tutorials and data files to work with in addition to just reading about the features? Any information you could provide would be greatly appreciated, thanks!

Tim