Windows Server 2008: The Learning Portal
Windows Server 2008 (formerly code name "Longhorn") helps IT professionals maximize control over their infrastructure with increased security, reliability, and flexibility. Let Microsoft Learning help you develop expertise in this next generation of Windows Server technologies with a broad spectrum of learning resources and streamlined certification paths. Included on this portal is a link to a free download for a Windows Server 2008 and Windows PowerShell E-Book.
Have a look at www.microsoft.com/learning/