I have this book in addition to Pro WPF in C# 2008. I think the recipes in this book are too simple to be useful. Looking through it 90% of the tips are things that are easy to figure out on your own if you have a basic understanding of WPF. Whenever I have had a moderate to difficult problem I have not found a solution in this book. Most of the time I find better solutions faster using Google, Stack Overflow and MSDN. If you already own a WPF book you are happy with, I would not recommend buying this one. You probably have a sufficient foundation with it to solve most of the problems in this book yourself.