Today's $10 Deal of the Day from APress at
http://www.apress.com/9781430229797 is Pro Silverlight 4 in C#
"Full-color graphics and screenshots throughout make
Pro Silverlight 4 in C# an invaluable reference for professional developers wanting to discover the new features of Silverlight 4. Author
Matthew MacDonald's expert advice guides you through creating rich media applications using Silverlight across browsers and platforms."