Professional Test Driven Development with C#: Developing Real World Applications with TDD (Wrox Professional Guides) by Jeff McWherter and James Bender (May 10, 2011)
Professional Test Driven Development is a good book. However, it uses C# examples, not Visual Basic. So, readers who prefer to develop in VB.Net will have to translate the code. This is a good skill to have anyway. But if people want to copy and paste the source code that is available on the Wrox press site, they can find converter programs. One of the online versions is at http://www.all4dotnet.com/convertcode.aspx.