Professional ASP.NET 4 in C# and VB by Bill Evjen
1536 pagesl Publisher: Wrox (March 8, 2010)
Language: English; ISBN-10: 0470502207; ISBN-13: 978-0470502204

ASP.NET Site Performance Secrets by Matt Perdeck
456 pages; Publisher: Packt Publishing (October 13, 2010)
Language: English; ISBN-10: 1849690685; ISBN-13: 978-1849690683

Professional ASP.NET Design Patterns by Scott Millett
720 pages; Publisher: Wrox; Pap/Dol edition (July 1, 2010)
Language: English; ISBN-10: 0470292784; ISBN-13: 978-0470292785

Beginning ASP.NET 4 in C# 2010 by Matthew MacDonald
1016 pages; Publisher: Apress; 1 edition (August 25, 2010)
Language: English; ISBN-10: 1430226080; ISBN-13: 978-1430226086

Pro ASP.NET 4 CMS: Advanced Techniques for C# Developers Using the .NET 4 Framework
320 pages; Publisher: Apress; 1 edition (June 22, 2010)
Language: English; ISBN-10: 1430227125; ISBN-13: 978-1430227120

To be a successful ASP.NET 4 developer, you need to know how to apply the vast array of new functionality available in the latest release of the .NET 4 Framework and Visual Studio 2010.