Ebook: Pro WPF in C# 2010: Windows Presentation Foundation in .NET 4

I would have given this book a 4 star rating if the content wasn't identical to that of another book I purchased with the title "Windows Presentation Foundation Unleashed" by Adam Nathan. I purchased this book thinking that I would learn something new but both authors gave identical (if nor verbatim) explanation on how the WPF parser works. This book isn't deserving of a 5 star rating for the following reasons. The author starts out very well in the first few chapters by explaining the under pings of XAML. However, in chapter 9 where data bindings is discussed, the author lost me and I had to resort to the book "Pro Silverlight 3 in C#" (which coincidentally written by the author of this book) to get a better explanation.