[Books] Good book: Test-Driven Development in Microsoft.NET

I've just started to read the book "Test-Driven Development in Microsoft.NET" and I must say it's darn good and a must read if you're a developer or architect. I'm a fan of Martin Fowler and was happily surprised to find lots of good stuff around refactoring in the same book!

If you haven't got it, go get it already :)