Head on over to http://www.writinghighperf.net to read a sample chapter of Writing High-Performance .NET Code, 2nd Edition. The sample PDF also includes some of the front and back material to give you a taste for the rest of the book.

Check out my latest book, the essential, in-depth guide to performance for all .NET developers:

Writing High-Performance.NET Code, 2nd Edition by Ben Watson. Available for pre-order:

Amazon
and more, see book site