Understanding Microsoft Virtualization Solutions from Microsoft Press is available as a FREE download.  

This 15MB E-Book gives an overview of all current Microsoft Virtualization technologies: Hyper-V, the Microsoft Enterprise Desktop Virtualization (MED-V), and VDI. It also describes which management solutions are available for them (e.g. System Center Virtual Machine Manager) and how they fit together. It is worth reading when planning the virtualization of your infrastructure.

You can find it here: http://csna01.libredigital.com/?urmvs17u33