Today's $10 Deal of the day book from APress at http://www.apress.com/9781430224556 is Introducing .NET 4.0 With Visual Studio 2010
"You may know what's happening in C#, but what about the Azure cloud? How is that going to affect your work? What are the limitations of the pLINQ syntax? Introducing .NET 4.0: with Visual Studio 2010 guides you through the innovations that matter and helps you to seize new opportunities confidently and quickly. "