Download Introducing Windows Server 2008 E-Book

Windows Server 2008 R2, or simply R2 for short, is the second release of
Windows Server 2008. It isn’t a completely new release, but rather adds
additional features and refinements to the existing release. This book, focus
on the new features and refinements in R2. This book assume you have at least a general knowledge of Windows Server, and that you have some familiarity with Windows Server 2008.