For IT professionals looking for an early, high-level view of Windows Server 2012, there's no better resource than the Microsoft Press e-book. Based on the beta release, this guide introduces its new features and capabilities, with scenario-based insights demonstrating how the platform can meet the needs of your business.
Introducing Windows Server 2012 (Based on Beta)
http://go.microsoft.com/FWLink/?Linkid=251464
if you are a fan of eReaders, you can download this book in ePub and Mobi format for free as well.
http://blogs.msdn.com/b/microsoft_press/archive/2012/06/04/free-ebook-introducing-windows-server-2012.aspx
EPUB
Introducing Windows Server 2012 EPUB ebook
MOBI
Introducing Windows Server 2012 MOBI ebook