OS X 10.8 Mountain Lion and OS X 10. Mountain Lion Server Review is just that, it's an overview of all of the aspects of OS X 10.8 Mountain Lion. The Review covers aspects from Notification Center, new features in Safari, Game Center, and Sandboxing. In addition to general users, the Server Administrators could benefit from the review as well.
The review covers OS X 10.8 Mountain Lion Server installation, features like refined DNS, Websites, Python Web apps, and Profile Manager.
Not a Server administrator, but you manage to develop for OS X? There's a section just for you as well. The developer section covers ARC, changes in iCloud, and auto-saving.
OS X 10.8 Mountain Lion Review is an overview for everybody. If you're new to OS X 10.8 Mountain Lion and OS X 10.8 Mountain Lion Server, this is a great book to introduce you to new features. If you're new to OS X in general, this will give you some overview as to what you can expect.