What would be the best book to know about cloud computing from basics ?

HI... i need a book to learn about cloud computing..... it must not be a reference purpose but it should cover from basics.... iam a beginner.. Please suggest me an appropriate book..What would be the best book to know about cloud computing from basics ?
I'm aware of cloud computing and what it means. This link my help you understand more..



http://technet.microsoft.com/en-us/ff404鈥?/a>



Best way for me to explain cloud computing is this....



Before, if we wanted e-mail programs and games and word processors, we would buy them and install them on our computers, basically we are using our hard-drive to store the program to create files.



Today however hard-drives (storage) is a lot cheaper to buy. So major corperations like yahoo, microsoft, google, facebook and pogo are buying major hard-drives and using them in their servers. They can allow (you or I) to use programs loaded on their hard-drive to accomplish the same thing.



Imagine never buying a "game" or "outlook" for e-mails or a "word processor" program to install on your computer (that uses up your resources)



Cloud computer puts everything on the company servers...for example, Yahoo Mail, Gmail, Hotmail, is cloud e-mail programs.......Pogo, Facebook Games is cloud games. OpenOffice is just like Microsoft Office, but it's available free and it runs from the OpenOffice website.



When everything is converted to cloud computing, you buy a computer and everything you will ever need is already online, gone are the days you buy a program to run on your computer.



Feel free to e-mail me if your still confused.



Cheers