There is a new and free eBook on 
Windows Azure from Mitch Tulloch and the Windows Azure team designed specifically for the IT Professional. If you haven’t had a chance to try Windows Azure or your just looking to learn more then this book is a good place to start.
The book goes into detail on most Windows Azure services along with screenshots to demonstrate the capabilities of the platform. If you have a bit more experience there are some under the hood insights and expert tips from insiders who develop, test and use the Windows Azure Platform.
You can download the PDF here and there is also companion content available here.