If you've ever wondered what time-sharing, multics and Unix have to do with today's hypervisor technologies, or why you should consider the global environment when planning your virtual machine strategy, then you'll want to read The Register's A Brief History of Virtualisation, on Kindle.
El Reg's Liam Proven takes us from IBM's early experiments, through the rings of Intel and right up to today's battles between Microsoft, VMWare et al.
Whether you want to convince your board that virtualisation will save your data centre, or explain to colleagues why it's nothing new at all and you've been doing that sort of thing for years actually, A Brief History of Virtualisation is the place to start.
You can get it here, from Amazon. ®