Todays Deal of the Day from O'Reilly at http://shop.oreilly.com/product/9780735627048.do is CLR via C#, Third Edition at $23.99
"Dig deep and master the intricacies of the common language runtime (CLR) and the .NET Framework 4.0. Written by a highly regarded programming expert and consultant to the Microsoft® .NET team, this guide is ideal for developers building any kind of application-including Microsoft® ASP.NET, Windows® Forms, Microsoft® SQL Server®, Web services, and console applications. You'll get hands-on instruction and extensive C# code samples to help you tackle the tough topics and develop high-performance applications."
Try using the discount code B2SDEAL - there should have been a discount code on the home page