In the Complete Guide .NET Performance and Optimization, Paul Glavich and Chris Farrell offer a comprehensive and essential handbook to anybody looking to set up a .NET testing environment and get the best results out of it, or just learn effective techniques for testing and optimizing their .NET applications.
An interesting look at performance testing. This book took the perspective of a developer investigating performance of an application and provided some methods to do this. It fell short in what I was looking for, which was a way to integrate performance testing into a Continuous Integration environment.