Book: "Programming Windows Presentation Foundation" from Chris Sells and Ian Griffiths

It's more than two months now that I'm working with WPF and I did a lot with it. The book helps to get into programming WPF and moreover to understand mechanisms and programming model of WPF. The Chapter "Custom Controls" mentions many issues but a it is little bit too short. There could be some more practical examples (I know this is not the intension of that book and perhaps you can write a whole manuscript concerning Custom Controls). The book's structure
is concise which supports efficient work. This book is essential for both: WPF-Beginners in order to understand WPF and of course for more experienced WPF-Programmers in order to have an excellent reference compared to the WinFX Documentation.