The first one is Framework Design Guidelines: Conventions, Idioms, and Patterns for Reusable .NET Libraries (Microsoft .NET Development Series).
This is a usefull book with some interesting tips for anyone who's interested in or is busy with designing and building frameworks. If you use FxCop, chances are that you're already familiar with most of the tips and guidelines that are in the book. Nonetheless, this book is usefull as reference-book but you can also read it from cover to cover. Most of the guidelines in the book are commented by people like Jeffrey Richter, Rico Mariani, etc... and these comments are very valuable as well.
The second book I've bought is Agile Software Development, Principles, Patterns, and Practices by Robert Martin.
I haven't found time to start reading this book, but due to the reviews on Amazon and other fora, I'm expecting a lot of it! Maybe I'll post a little review on my blog about this book, after I've read it.
Again, two books that I can remove from my book whishlist
Correction: I didn't really buy the 1st book; it was rather a present. :)