Microsoft Press publishes books and eBooks on Microsoft products which you can purchase  if you have subscription of safari Books online , and Microsoft Press also offers few chapters of those books as  free eBooks to users.

Here are recent free eBooks given away by Microsoft Press  you can download in XPS or PDF format

Moving to  Microsoft Visual Studio 2010 (DRAFT Preview)

Moving to  Microsoft Visual Studio 2010 (DRAFT Preview II)

Code for “Moving to Microsoft Visual Studio 2010” DRAFT ebooks

Introducing Microsoft SQL Server 2008 R2

Programming Windows  Phone 7  Series (DRAFT  Preview ) (by Charles Petzold)

Own your Future : Update your  Skills with  Resources and Career Ideas from Microsoft

Understanding Microsoft Virtualization Solutions (Second Edition)

First Look Microsoft Office 2010

Windows 7  Troubleshooting tips

Introducing Windows Server 2008 R2

Deploying Windows 7, Essential Guidance