This is a fantastic book for learning VBA programming in Excel. The first 70 pages are devoted to programming basics (variables, conditional statements, objects, modules and procedures, etc.) Most of the rest of the book is devoted to glorious Excel tasks and objects. Really, this is quality material.
A mere 30 pages is devoted to .NET. Most of this is simply how to fire up Visual Studio and create a project. Worthless, really. I'm betting that the publisher made the decision to add ".NET" to the title since that was a sexy buzzword back in '03. I'm subtracting a single star for this little piece of marketing deception. In summary, this book is terrific for learning Excel VBA (and general programming principles), but is no good for learning how to marry Excel to .NET.