Initially this proved to be an okay read, giving an insight into the complex emergence of virtualization from engineering tool on mainframes, to academic insight, to commercial success. But soon the text starts to ramble, at the half way mark you are treated to a discourse about the costs and envrionmental benefits of down sizing? Sorry, is this about Virtualization, or is the author trying to sell on their own particular style of consultation to potential clients?
The text continues to ramble, taking us on a discussion about multi-core/multi-thread processing, and how people are sold "more machine" than they need for the purposes they use it. A noble crusade, but not one for this text.
The format of the book is also somewhat poor, there are multiple typographical mistakes, and clearly the text hasn't been proof read to the nth degree. The text formatting is also messy, I wish it were in justified mode for example. I also wish that section headings were not so randomly thrown in.
All in all, a good first quater, but the rest of the book is a mess, even at this low price I'd not recommend this as a book to introduce you to the history of virtualization, nor as a refeerence to cite when trying to persuade your IT Director to spring the cash for a new server.