Well as you can see the title is quite but extremely accurate. The book covers a "real world" use of Windows Workflow foundation. The author takes you through Windows Workflow Foundation by building a bug tracking application which is an ideal candidate for a workflow technology. I think this approach is what makes this book stand apart from other Windows Workflow foundation books. It is short and concise and gives you a real application of the technology. This is not a book filled with marketing fluff or the Hello World app (with the exception of the first chapter).
Overall, this book is a good read for those that want to get started in Windows Workflow Foundation.
The books web site: http://www.packtpub.com/windows-workflow-foundation-Csharp/book