Hyper-V Security book
A fellow MVP Andy Syrewicze and Eric Siron wrote a Hyper-V Security book. the book is a guide on how to defend your virtual environment from attack.
The book covers securing the Hyper- Hosts, the Virtual Machines, the Network and the Storage as well as how VMM in play changes the security approach.
You can buy it at http://www.amazon.com/Hyper-V-Security-Eric-Siron-ebook/dp/B00RP13BOY/ref=asap_bc?ie=UTF8