I've written a German-speaking Silverlight book. It's called "Silverlight 4 - das umfassende Handbuch" It's available end of August 2010 . Below you find the content of the silverlight book. As the book is in German, you find more details about it by switching to german/deutsch

Silverlight 4 - The ultimate handbook
> Jump into Silverlight and XAML
> Professional development of Rich Internet Applications
> Includes Graphics, Multimedia, Animations,
Out-of-Browser-Apps and much more.

 Content
1 Silverlight Introduction
2 The Programm-Model
3 XAML
4 Controls
5 Layout
6 Dependency Properties
7 Input Events
8 Commands
9 Resources
10 Styles and Templates
11 Custom Controls
12 Data
13 Services and Communication
14 Isolated Storage
15 2D Graphics
16 Animations
17 Multimedia
18 Printing
19 Applications
20 Browser, HTML and JavaScript